this_o kind_n that_o come_v to_o my_o knowledge_n i_o shall_v add_v only_o by_o and_o by_o the_o product_n of_o a_o more_o recent_a trial_n 2._o as_o far_o as_o i_o have_v hitherto_o observe_v those_o ferruginous_a water_n that_o be_v not_o heavy_a than_o common_a water_n and_o in_o most_o drinker_n prove_v but_o diuretic_n afford_v but_o very_o little_a caput_n mortuum_n or_o dry_a substance_n upon_o the_o total_a evaporation_n of_o the_o liquor_n whereas_o mineral_n water_n that_o be_v purge_v and_o manifest_o more_o ponderous_a in_o specie_fw-la then_o common_a water_n leave_v upon_o evaporation_n a_o considerable_a quantity_n of_o residence_n tho'_o some_o far_o less_o than_o other_o 3._o at_o once_o to_o explain_v and_o partly_o prove_v what_o i_o have_v be_v say_v i_o shall_v here_o recite_v that_o from_o a_o pound_n of_o barnet_n water_n which_o be_v know_v to_o be_v purgative_a slow_o evaporate_v we_o obtain_v a_o dram_n of_o white_a powder_n but_o from_o the_o like_a quantity_n of_o tunbridge_n water_n we_o obtain_v but_o about_o one_o grain_n of_o caput_n mortuum_n and_o if_o i_o misremember_v not_o we_o have_v but_o about_o a_o grain_n and_o a_o half_a from_o 25._o ounce_n of_o the_o german_a spa_n water_n 4._o it_o may_v seem_v scarce_o credible_a to_o many_o that_o so_o small_a a_o quantity_n of_o matter_n of_o which_o perhaps_o not_o one_o half_a be_v saline_n or_o metalline_a the_o rest_n be_v teresstrial_a shall_v impart_v a_o manifest_a virtue_n to_o so_o great_a a_o proportion_n of_o water_n but_o this_o difficulty_n do_v not_o much_o trouble_v i_o who_o have_v purposely_o make_v divers_a experiment_n to_o discover_v how_o small_a a_o proportion_n of_o mineral_n matter_n may_v suffice_v when_o dissolve_v to_o impregnate_n common_a water_n i_o remember_v i_o take_v one_o grain_n of_o iron_n stone_n casual_o find_v near_o the_o spring_n at_o islington_n from_o which_o mineral_n it_o be_v probable_a those_o water_n derive_v their_o virtue_n this_o be_v open_v by_o the_o fire_n and_o dissolve_v as_o far_o as_o it_o will_v be_v in_o a_o little_a spirit_n of_o salt_n we_o let_v fall_v a_o drop_n or_o two_o of_o the_o yellowish_a solution_n into_o a_o great_a proportion_n of_o infusion_n of_o gall_n to_o which_o it_o present_o give_v a_o deep_a colour_n than_o tunbridge_n water_n or_o even_o the_o german_a spa_n water_n be_v wont_a to_o give_v here_o at_o london_n with_o the_o powder_n of_o gall_n so_o that_o we_o guess_v that_o if_o we_o have_v then_o have_v at_o hand_n a_o competent_a quantity_n of_o the_o infusion_n the_o remain_a part_n of_o the_o martial_a solution_n will_v have_v be_v able_a to_o colour_v ten_o time_n a_o great_a quantity_n of_o the_o infusion_n than_o our_o trial_n be_v make_v upon_o this_o will_v be_v easy_o believe_v by_o he_o that_o shall_v consider_v a_o experiment_n we_o afterward_o make_v to_o the_o same_o purpose_n which_o be_v this_o we_o dissolve_v a_o half_a grain_n of_o a_o good_a marcasite_n take_v up_o not_o far_o from_o london_n in_o a_o small_a quantity_n of_o spirit_n of_o niter_n which_o for_o a_o certain_a reason_n i_o make_v choice_n of_o tho'_o other_o acid_n menstruum_n as_o aquafortis_n and_o spirit_n of_o salt_n will_v have_v dissolve_v the_o mineral_n this_o small_a solution_n we_o put_v into_o a_o pound_n of_o pretty_a high_a tincture_n of_o gall_n make_v by_o infuse_v they_o in_o common_a water_n and_o find_v as_o we_o expect_v that_o this_o mixture_n grow_v very_o dark_a we_o fill_v a_o vial_n with_o it_o and_o empty_v that_o vial_n into_o a_o large_a glass_n we_o fill_v the_o same_o vial_n three_o time_n with_o common_a water_n to_o dilute_v it_o notwithstanding_o which_o this_o new_a mixture_n be_v put_v into_o one_o of_o our_o usual_a glass_n appear_v of_o a_o colour_n much_o deep_a than_o that_o which_o the_o water_n of_o tunbridge_n or_o the_o german_a spa_n have_v former_o give_v with_o the_o powder_n of_o gall_n so_o that_o probable_o if_o another_o vial_n of_o common_a water_n have_v be_v add_v it_o will_v yet_o have_v afford_v a_o purple_a colour_n if_o not_o a_o deep_a so_o that_o one_o part_n of_o dissolve_v marcasite_n communicate_v a_o tincture_n to_o 61440_o sixty_o one_o thousand_o four_o hundred_o and_o forty_o part_n of_o infusion_n of_o gall_n and_o that_o which_o make_v this_o experiment_n more_o considerable_a be_v that_o this_o small_a quantity_n of_o marcasite_n be_v not_o itself_o all_o martial_a or_o metalline_a for_o from_o our_o english_a marcasite_n as_o well_o as_o other_o i_o have_v obtain_v a_o pretty_a quantity_n of_o sulphur_n like_o common_a sulphur_n beside_o that_o they_o afford_v a_o not_o despicable_a quantity_n of_o terrestrial_a substance_n about_o who_o nature_n i_o have_v not_o yet_o satisfy_v myself_o 5._o i_o shall_v now_o add_v this_o reflection_n that_o since_o the_o marcasite_n impregnate_v so_o much_o water_n with_o its_o corporeal_a part_n if_o i_o may_v so_o call_v they_o obtain_v by_o bare_a dissolution_n it_o seem_v high_o probable_a that_o the_o same_o quantity_n of_o liquor_n may_v be_v impregnate_v by_o a_o far_o less_o quantity_n of_o mineral_n matter_n attenuate_v into_o a_o kind_n of_o spirituous_a slate_n by_o be_v raise_v in_o the_o form_n of_o fume_n or_o exhalation_n and_o that_o imperfect_a or_o embryonated_a iron_n may_v be_v so_o will_v scarce_o be_v deny_v by_o they_o that_o consider_v the_o way_n that_o i_o have_v in_o another_o paper_n deliver_v to_o make_v iron_n manifest_o emit_v copious_a fume_n without_o the_o help_n of_o external_a fire_n and_o if_o it_o be_v with_o some_o such_o spirituous_a and_o volatile_a exhalation_n that_o a_o mineral_n water_n as_o that_o of_o tunbridge_n or_o of_o islington_n be_v impregnate_v it_o be_v not_o hard_a to_o conceive_v that_o they_o may_v easy_o lose_v their_o chief_a virtue_n by_o the_o avolation_n of_o most_o or_o many_o of_o their_o fugitive_a part_n upon_o their_o be_v remove_v to_o a_o distance_n from_o the_o spring_n head_n and_o to_o make_v it_o probable_a that_o vitriolate_a corpuscle_n may_v be_v make_v to_o ascend_v without_o lose_v their_o nature_n i_o shall_v here_o mention_v a_o experiment_n that_o i_o devise_v to_o give_v some_o light_n in_o this_o matter_n i_o have_v often_o find_v by_o trial_n that_o a_o spirit_n rich_o impregnate_v with_o volatilise_v sulphur_n will_v with_o vitriol_n whether_o in_o the_o form_n of_o a_o powder_n or_o a_o solution_n produce_v in_o a_o trice_n a_o very_a dark_a or_o blackish_a colour_n and_o guess_v that_o in_o mercury_n turn_v by_o the_o addition_n of_o salt_n and_o vitriol_n into_o corrosive_a sublimate_n many_o of_o the_o vitriolate_a corpuscle_n may_v ascend_v with_o the_o mercurial_a one_o i_o take_v such_o a_o volatile_a sulphureous_a tincture_n as_o i_o have_v be_v mention_v which_o for_o this_o purpose_n ought_v to_o be_v deep_a and_o have_v drop_v it_o upon_o good_a sublimate_n i_o find_v it_o turn_v present_o of_o a_o very_a opacous_a colour_n to_o show_v also_o that_o to_o make_v a_o great_a dilatation_n or_o dispersion_n of_o the_o martial_a corpuscle_n of_o a_o ore_n or_o mineral_n there_o need_v no_o spirit_n of_o salt_n or_o the_o like_a distil_a menstruum_fw-la i_o procure_v from_o a_o copperas-work_n or_o place_n where_o vitriol_n be_v make_v by_o art_n some_o of_o the_o liquor_n they_o employ_v before_o they_o cast_v in_o iron_n that_o be_v corrode_v by_o it_o it_o may_v increase_v the_o weight_n and_o give_v solidity_n and_o some_o other_o quality_n to_o the_o design_a vitriol_n now_o thó_n this_o liquor_n be_v make_v without_o any_o chemical_a menstruum_fw-la bare_o by_o rain_n or_o snow-water_n that_o impregnate_v itself_o with_o saline_n or_o metalline_a particle_n in_o its_o passage_n through_o bed_n of_o marcasite_n that_o lie_v expose_v to_o the_o sun_n and_o air_n yet_o in_o this_o water_n such_o number_n of_o martial_a corpuscle_n be_v disperse_v that_o have_v shake_v four_o drop_n of_o it_o into_o 12_o ounce_n and_o a_o half_a of_o common_a water_n this_o liquor_n as_o i_o expect_v be_v thereby_o so_o impregnate_v that_o with_o powder_n of_o gall_n it_o present_o produce_v as_o deep_a a_o colour_n as_o good_a tunbridge_n water_n will_v have_v do_v so_o that_o suppose_v a_o drop_n of_o this_o liquor_n to_o weigh_v about_o a_o grain_n as_o by_o some_o trial_n purposely_o make_v we_o find_v it_o to_o do_v it_o appear_v that_o one_o part_n of_o the_o vitriolate_a water_n be_v able_a manifest_o to_o impregnate_n 1500_o part_n of_o common_a water_n and_o yet_o of_o these_o 4_o drop_n or_o grain_n of_o vitriolate_a liquor_n a_o considerable_a part_n may_v very_o probable_o be_v conclude_v from_o the_o way_n of_o its_o production_n to_o have_v be_v rain_n water_n as_o will_v easy_o be_v grant_v when_o i_o shall_v have_v add_v that_o to_o examine_v this_o supposition_n or_o
powder_n must_v be_v stale_a 34_o 35_o 16._o the_o best_a way_n for_o produce_v of_o new_a colour_n with_o mineral_n water_n be_v to_o make_v the_o infusion_n of_o gall_n with_o a_o certain_a weight_n of_o the_o powder_n in_o a_o determinate_a weight_n of_o water_n 35_o 36_o 17._o oaken_a leaf_n dry_v red_a rose_n leave_v the_o juice_n the_o peel_n of_o pomegranate_n the_o blossom_n call_v common_o callaustia_n and_o some_o other_o astringent_a vegetable_n may_v be_v substitute_v to_o gall_n 38_o 18._o the_o eye_n must_v be_v judge_n of_o the_o impregnation_n of_o the_o water_n by_o the_o infusion_n or_o powder_n of_o gall_n 37_o 19_o the_o way_n of_o try_v mineral_n water_n by_o the_o change_n of_o colour_n that_o gall_n produce_v in_o they_o be_v neither_o of_o that_o extent_n nor_o of_o that_o certainty_n it_o be_v vulgar_o presume_v to_o be_v of_o 39_o 20._o there_o be_v divers_a metalline_a oar_n and_o other_o mineral_n body_n which_o not_o particpate_v of_o iron_n will_v not_o be_v discoverable_a by_o the_o infusion_n of_o gall_n ib._n 21._o a_o body_n of_o a_o metalline_a nature_n and_o not_o participate_v of_o iron_n may_v with_o infusion_n of_o gall_n afford_v a_o very_a dark_a colour_n 40_o 22._o it_o be_v not_o certain_a if_o all_o the_o liquor_n impregnate_v with_o iron_n will_v be_v discover_v to_o be_v so_o by_o the_o colour_n they_o afford_v with_o gall_n ib._n 23._o that_o it_o be_v a_o mistake_n general_o take_v for_o grant_v viz._n that_o the_o infusion_n of_o gall_n will_v certain_o discover_v by_o become_v black_a or_o purple_a of_o a_o mineral_n water_n that_o be_v mix_v with_o it_o be_v to_o vitriolate_v 41_o 24._o a_o odd_a kind_n of_o whitish_a earth_n to_o be_v find_v in_o the_o northern_a country_n of_o england_n where_o there_o come_v divers_a mineral_n water_n 42_o 25._o gall_n be_v cast_v into_o the_o solution_n of_o several_a metal_n produce_v no_o blackish_a colour_n except_o with_o the_o solution_n of_o gold_n 44_o 26._o a_o sulphureous_a liquor_n proclaim_v notable_a change_n of_o colour_n with_o several_a solution_n of_o metal_n ib._n 27._o it_o be_v fit_a if_o not_o necessary_a that_o the_o experimenter_n look_v upon_o the_o change_n of_o colour_n make_v by_o gall_n both_o while'tis_o a_o produce_v and_o where'tis_o produce_v in_o a_o good_a light_n and_o with_o a_o heedful_a eye_n 46_o 28._o that_o there_o may_v be_v a_o kind_n of_o physiognogmy_n of_o natural_a body_n as_o well_o as_o of_o humane_a face_n ib._n 29._o a_o way_n to_o vary_v the_o shade_n and_o other_o phoenomena_fw-la of_o colour_n produce_v with_o mineral_n liquor_n 47_o 30._o another_o way_n somewhat_o differ_v from_o the_o former_a 48_o 31._o it_o be_v convenient_a to_o use_v beside_o gall_n or_o oaken-leaf_n for_o the_o produce_v of_o new_a colour_n with_o mineral_n water_n red-rose_n balerustium_n leolewood_n brasil_n and_o other_o astringent_a pigment_n 50_o 32._o a_o way_n of_o make_v a_o liquor_n which_o will_v turn_v black_a with_o a_o solution_n either_o of_o martial_a or_o capreous_a vitriol_n 51._o 33._o many_o water_n may_v partake_v of_o sulphur_n without_o be_v take_v notice_n of_o to_o do_v so_o 54_o 34._o that_o copper_n that_o have_v be_v melt_v into_o a_o body_n may_v be_v so_o subtilise_v and_o disguise_v as_o to_o have_v a_o multitude_n of_o its_o metalline_a part_n make_v ascend_v with_o other_o in_o the_o form_n of_o a_o transparent_a liquor_n like_o common_a water_n and_o yet_o by_o put_v to_o it_o another_o substance_n as_o volatile_a and_o colourless_a as_o itself_o it_o will_v present_o discover_v the_o copper_n it_o contain_v by_o turn_v as_o blue_a as_o saphire_n 55_o 35._o experiment_n discover_v the_o inexistence_n of_o arsenic_n in_o water_n and_o somewhat_o of_o the_o nature_n of_o that_o dangerous_a mineral_n 56_o 36._o the_o deleterious_a nature_n of_o arsenic_n consist_v not_o only_o or_o main_o in_o a_o transcendent_o acid_n nor_o in_o a_o lixiviate_v causticle_n quality_n but_o in_o a_o corrosiveness_n svi_fw-la generis_fw-la ib._n 37._o a_o useful_a way_n for_o water-drinker_n of_o examine_v a_o mineral_n water_n suspect_v to_o contain_v arsenic_n 60_o 38._o why_o the_o author_n have_v insist_v so_o much_o upon_o the_o thirteen_o article_n of_o the_o set_v of_o title_n 61_o 39_o to_o what_o the_o knowledge_n of_o the_o degree_n of_o coldness_n in_o the_o water_n especial_o if_o it_o be_v extraordinary_a may_v be_v useful_a 63_o 40._o divers_a way_n of_o estimate_v the_o degree_n of_o coldness_n and_o heat_n in_o the_o water_n 64_o 41._o the_o usefulness_n of_o the_o knowledge_n of_o the_o specific_a gravity_n of_o a_o mineral_n water_n ib._n 42._o the_o difficulty_n of_o weigh_v exact_o liquor_n 67_o 43._o the_o most_o exact_a way_n of_o measure_v the_o weight_n of_o water_n 68_o 44._o the_o determinate_a weight_n of_o most_o mineral_n water_n and_o other_o about_o london_n as_o likewise_o of_o the_o german_a spaw-water_n 69_o 45._o how_o to_o discover_v the_o kind_n of_o soil_n through_o which_o the_o water_n have_v pass_v 71_o 46._o no_o difference_n observe_v between_o mineral_n water_n and_o common_a water_n look_v upon_o through_o good_a microscope_n 72_o 47._o that_o the_o little_a creature_n we_o discover_v through_o magnify_v glass_n in_o water_n wherein_o pepper_n have_v be_v infuse_v be_v not_o inanimate_a concretion_n but_o real_o live_v creature_n 73_o 48._o where_o the_o scent_n of_o several_a mineral_n water_n be_v best_a judge_v of_o 74_o 49._o that_o there_o be_v some_o spring_n of_o â—â—l_a viny_a odour_n ib._n 50._o that_o man_n be_v apt_a to_o take_v all_o stink_a water_n for_o sulphureous_a whereas_o sometime_o they_o be_v bituminous_a though_o the_o spring_n may_v sometime_o partake_v both_o of_o sulphur_n and_o bitumen_n 75_o 51._o that_o there_o be_v a_o manifest_a difference_n in_o reference_n to_o transportation_n in_o such_o ferruginous_a water_n as_o be_v light_a than_o common_a water_n 76_o 52._o how_o we_o may_v guess_v at_o the_o saltness_n of_o water_n 79_o 53._o that_o it_o be_v not_o easy_a to_o discover_v the_o accidity_n of_o liquor_n 81_o 54._o by_o what_o way_n we_o may_v know_v the_o predominancy_n of_o acidity_n in_o the_o salt_n propose_v 85_o 55._o how_o we_o may_v know_v the_o predominancy_n of_o a_o alcaly_a in_o the_o salt_n of_o a_o mineral_n water_n 86_o 56._o salt_n afford_v by_o the_o famous_a water_n of_o bourben_n in_o france_n find_v to_o be_v alcalisate_n 88_o 57_o several_a way_n of_o discover_v vitriol_n to_o be_v predominant_a in_o the_o saline_n part_n of_o a_o mineral_n water_n ib._n 56._o what_o salt_n our_o english_a water_n be_v impregnate_v with_o and_o from_o what_o salt_n the_o purgative_a virtue_n that_o be_v find_v in_o many_o of_o they_o as_o in_o epsom_n barnet_n and_o acton_n water_n etc._n etc._n do_v proceed_v 90_o 57_o that_o two_o body_n which_o be_v neither_o of_o they_o cathartick_n may_v by_o change_n of_o texture_n wrought_v in_o one_o another_o compose_v a_o three_o body_n that_o be_v brisk_o purgative_a 92_o 58._o how_o great_a a_o inequality_n may_v be_v sometime_o meet_v with_o in_o the_o proportion_n that_o the_o same_o quantity_n of_o two_o differ_a mineral_n water_n bear_v to_o the_o caput_fw-la mortuum_n they_o respective_o afford_v 94_o 59_o that_o a_o small_a quantity_n of_o matter_n of_o which_o perhaps_o not_o one_o half_a be_v saline_n or_o metalline_a the_o rest_n be_v terresstrial_a may_v impart_v a_o manifest_a virtue_n to_o a_o great_a proportion_n of_o water_n 95_o 60._o a_o spirit_n rich_o impregnate_v with_o volatilise_v sulphur_n produce_v with_o vitriol_n in_o a_o trice_n whether_o in_o the_o form_n of_o a_o powder_n or_o solution_n a_o very_a dark_a or_o blackish_a colour_n 99_o 61._o title_n for_o the_o natural_a history_n of_o a_o mineral_n water_n propose_v consider_v as_o a_o medicine_n be_v the_o three_o part_n of_o the_o design_v work_n 102_o 62._o a_o short_a discourse_n of_o the_o author_n relate_v to_o this_o present_a treatise_n 110_o 63._o if_o the_o fall_n of_o rains_n weaken_v the_o virtue_n of_o the_o mineral_n water_n 6_o 113._o short_a memoir_n for_o the_o natural_a and_o experimental_a history_n of_o particular_a mineral_n water_n address_v to_o his_o learned_a friend_n dr._n s._n l_o sect_n i._o so_o many_o year_n sir_n have_v past_a since_o i_o have_v occasion_n to_o consider_v mineral_n water_n and_o opportunity_n to_o make_v trial_n on_o they_o with_o any_o application_n of_o mind_n that_o though_o since_o that_o time_n some_o virtuoso_n have_v be_v please_v public_o to_o declare_v that_o they_o find_v some_o direction_n they_o receive_v from_o i_o not_o unuseful_a to_o the_o examen_fw-la of_o such_o water_n yet_o have_v sorgotten_v many_o of_o my_o past_a thought_n and_o lose_v on_o mislay_v most_o of_o my_o memorial_n about_o matter_n of_o fact_n relate_v to_o
a_o very_a pernicious_a drug_n and_o yet_o have_v be_v suspect_v to_o be_v clandestine_o mingle_v with_o some_o mineral_n water_n which_o i_o think_v the_o less_o improbable_a because_o some_o of_o the_o marcasitical_a body_n by_o which_o some_o mineral_n water_n pass_v be_v judge_v not_o to_o be_v devoid_a of_o arsenic_n for_o these_o reason_n i_o say_v and_o for_o this_o other_o which_o make_v the_o mention_n of_o it_o pertinent_a in_o this_o place_n that_o gall_n do_v not_o as_o i_o elsewhere_o note_n discover_v at_o all_o the_o inexistence_n of_o this_o poisonous_a drug_n in_o water_n tho'_o the_o liquor_n be_v copious_o impregnate_v with_o it_o i_o think_v fit_a to_o make_v some_o trial_n that_o seem_v to_o i_o likely_a to_o discover_v at_o once_o the_o in_o existence_n of_o arsenic_n in_o water_n and_o somewhat_o of_o the_o nature_n of_o that_o dangerous_a mineral_n happen_v some_o year_n ago_o to_o taste_v arsenic_n not_o without_o some_o little_a danger_n and_o inconvenience_n the_o taste_n of_o it_o do_v not_o seem_v to_o i_o to_o favour_v the_o vulgar_a supposition_n that_o its_o poisonous_a nature_n consist_v in_o a_o high_o acid_n salt_n whereas_o its_o taste_n agree_v well_o with_o my_o conjecture_n who_o suspect_v it_o to_o be_v of_o a_o exceed_a corrode_a or_o fret_a nature_n but_o who_o corrosiveness_n be_v svi_fw-la generis_fw-la that_o be_v of_o a_o peculiar_a kind_n have_v then_o make_v a_o strong_a solution_n of_o arsenic_n in_o common_a water_n which_o do_v not_o without_o some_o skill_n easy_o dissolve_v it_o we_o mix_v a_o small_a proportion_n of_o it_o with_o the_o german-spaw_n water_n and_o then_o drop_v into_o this_o mixture_n some_o high_o dephlegm_v spirit_n of_o urine_n we_o perceive_v a_o light_a lactescence_n to_o be_v produce_v and_o a_o whitish_a precipitate_v very_o slow_o to_o subside_o we_o find_v also_o that_o a_o little_a excellent_a oil_n of_o tartar_n per_fw-la deliquium_fw-la be_v drop_v into_o some_o of_o the_o late_o mention_v solution_n of_o arsenic_n produce_v a_o heavy_a whitish_a cloud_n which_o present_o settle_v at_o the_o low_a part_n of_o the_o glass_n we_o also_o put_v oil_n of_o vitriol_n as_o one_o of_o the_o strong_a acid_n we_o know_v into_o the_o solution_n of_o arsenic_n but_o do_v not_o perceive_v that_o the_o oil_n make_v a_o precipitation_n or_o wrought_v much_o otherwise_o on_o it_o than_o it_o will_v have_v do_v upon_o common_a water_n and_o by_o these_o three_o trial_n one_o will_v suspect_v that_o arsenic_n be_v at_o lest_o ex_fw-la praedominio_fw-la a_o acid_n body_n but_o not_o content_a with_o these_o we_o put_v some_o of_o the_o arsenical_a liquor_n upon_o some_o syrup_n of_o violet_n and_o find_v it_o to_o change_v the_o syrup_n tho'_o but_o slow_o rather_o to_o a_o green_a than_o a_o red_a or_o purple_a colour_n we_o put_v to_o another_o portion_n of_o the_o same_o liquor_n some_o of_o our_o volatile_a sulphureous_a spirit_n but_o take_v notice_n of_o no_o precipitation_n that_o ensue_v for_o a_o severe_a examen_fw-la we_o employ_v a_o trial_n that_o we_o successful_o make_v use_v of_o and_o have_v deliver_v in_o another_o paper_n to_o discover_v such_o slight_a degree_n of_o acidity_n in_o liquor_n as_o by_o ordinary_a trial_n be_v not_o discoverable_a but_o we_o can_v not_o by_o this_o way_n discern_v the_o least_o acidity_n in_o our_o arsenical_a solution_n but_o rather_o a_o manifest_a token_n of_o a_o urinous_a or_o lixiviate_v quality_n with_o the_o former_a experiment_n agree_v very_o well_o that_o which_o we_o afteward_n make_v by_o put_v some_o of_o the_o arsenical_a liquor_n into_o a_o strong_a solution_n of_o common_a sublimate_n make_v in_o fair_a water_n for_o by_o this_o mean_v we_o have_v a_o copious_a precipitate_v such_o as_o may_v have_v be_v expect_v from_o a_o alkaline_a precipitant_n and_o this_o be_v not_o brick-coloured_a as_o fix_v alcali_n produce_v with_o dissolve_v sublimate_n but_o white_a such_o as_o urinous_a or_o volatile_a alcaly_n as_o they_o call_v they_o be_v wont_a to_o make_v with_o the_o same_o liquor_n the_o forego_v trial_n have_v be_v make_v at_o one_o time_n when_o i_o be_v in_o haste_n and_o not_o at_o all_o fond_a of_o have_v to_o do_v with_o arsenic_n for_o which_o reason_n i_o cause_v the_o solution_n to_o be_v present_o throw_v away_o to_o prevent_v dangerous_a mistake_n tho'_o what_o i_o have_v hitherto_o try_v seem_v very_o favourable_a to_o our_o propose_a conjecture_n that_o tho'_o arsenic_n be_v a_o very_a corrosive_a body_n and_o perhaps_o upon_o that_o score_n poisonous_a yet_o its_o deleterious_a nature_n do_v not_o consist_v only_o or_o main_o in_o a_o transcendent_o acid_n nor_o in_o a_o lixiviate_v caustick_a quality_n but_o in_o a_o corrosiveness_n svi_fw-la generis_fw-la i_o mean_v peculiar_a and_o distinct_a yet_o i_o shall_v forbear_v to_o be_v positive_a in_o this_o conjecture_n till_o further_a trial_n pretend_v only_o by_o what_o have_v be_v say_v to_o show_v the_o need_n of_o examine_v the_o vulgar_a supposition_n by_o further_a inquiry_n and_o to_o give_v some_o hint_n towards_o the_o find_n of_o antidote_n against_o this_o cruel_a poison_n i_o shall_v now_o add_v that_o for_o the_o sake_n of_o water-drinker_n i_o cast_v about_o in_o my_o thought_n for_o some_o way_n that_o may_v be_v of_o some_o use_n tho'_o of_o no_o certainty_n in_o examine_v a_o mineral_n water_n suspect_v to_o contain_v arsenic_n to_o which_o purpose_n for_o reason_n which_o haste_n forbid_v i_o to_o mention_v i_o pitch_v upon_o vitriolate_a body_n and_o find_v that_o if_o a_o little_a solution_n of_o dantzick_n vitriol_n be_v put_v to_o a_o convenient_a quantity_n of_o arsenical_a liquor_n there_o will_v present_o ensue_v a_o great_a change_n of_o colour_n and_o a_o dark_a substance_n will_v by_o degree_n precipitate_v itself_o and_o settle_v in_o the_o low_a part_n of_o the_o glass_n the_o like_a effect_n we_o find_v when_o we_o put_v english_a vitriol_n which_o have_v no_o copper_n add_v in_o the_o make_n as_o that_o of_o dantzick_n have_v be_v either_o altogether_o or_o almost_o total_o martial_a into_o a_o considerable_a proportion_n of_o the_o arsenical_a solution_n i_o fear_v i_o shall_v be_v think_v to_o have_v dwell_v by_o far_o too_o long_o upon_o this_o one_o 13_o article_n of_o our_o sett_n of_o title_n but_o i_o be_v tempt_v to_o do_v it_o partly_o because_o i_o think_v the_o subject_n seem_v both_o to_o merit_v and_o to_o need_v it_o partly_o because_o i_o think_v fit_a to_o give_v a_o instance_n that_o may_v show_v that_o even_o that_o part_n of_o the_o exploration_n of_o mineral_n water_n that_o be_v judge_v to_o be_v the_o most_o cultivate_v have_v be_v but_o superficial_o enough_o consider_v and_o partly_o too_o because_o my_o want_n of_o health_n and_o my_o preingagement_n to_o some_o subject_n that_o i_o be_o more_o concern_v for_o then_o i_o be_o for_o that_o i_o now_o treat_v of_o permit_v i_o to_o make_v few_o other_o than_o short_a note_n upon_o the_o particular_a article_n and_o clause_n of_o this_o scheme_n of_o title_n i_o think_v it_o not_o amiss_o by_o refer_v all_o the_o forego_n observation_n and_o trial_n to_o the_o same_o topick_n to_o give_v one_o specimen_fw-la tho'_o but_o a_o imperfect_a one_o of_o those_o that_o for_o distinction_n sake_n i_o style_v large_a annotation_n and_o though_o the_o title_n these_o belong_v to_o be_v the_o thirteen_o in_o the_o scheme_n of_o the_o two_o part_n yet_o i_o think_v fit_a to_o premise_v these_o note_n to_o all_o the_o rest_n though_o divers_a of_o they_o be_v on_o title_n antecedent_n to_o the_o thirteen_o because_o one_o or_o other_o of_o the_o many_o particular_n refer_v to_o this_o last_o name_v title_n may_v probable_o be_v of_o use_n to_o you_o in_o consider_v many_o of_o the_o other_o article_n of_o this_o scheme_n whether_o they_o follow_v the_o thirteen_o or_o precede_v it_o marginal_a note_n for_o the_o ii_o or_o physico-chymical_a part_n of_o the_o natural_a history_n of_o a_o mineral_n water_n propose_v note_n on_o the_o first_o title_n i._o 1._o the_o article_n mention_n actual_a coldness_n and_o heat_n because_o we_o do_v not_o here_o consider_v that_o which_o the_o school_n call_v potential_a 2._o the_o knowledge_n of_o the_o degree_n of_o coldness_n in_o the_o water_n especial_o if_o it_o be_v extraordinary_a may_v somewhat_o assist_v the_o examiner_n to_o guess_v whether_o the_o spring_n come_v from_o some_o notable_a depth_n under_o ground_n before_o it_o ascend_v or_o whether_o it_o run_v through_o a_o soil_n abound_v with_o salt-peter_n or_o sal-armoniac_a or_o some_o such_o very_a refrigerate_a substance_n 3._o the_o degree_n of_o coldness_n or_o heat_n may_v be_v estimate_v several_a way_n as_o if_o the_o water_n be_v cold_a by_o its_o have_v or_o not_o have_v the_o power_n to_o coagulate_v essential_a oil_n of_o anis_z seed_n or_o
that_o of_o fennell_n seed_n &_o if_o it_o be_v that_o by_o its_o be_v or_o not_o be_v able_a to_o melt_v body_n of_o somewhat_o differ_v disposition_n to_o fusion_n as_o butte_n tallow_n bees-was_a etc._n etc._n or_o to_o coagulate_v the_o white_n of_o egg_n or_o to_o boil_v egg_n in_o the_o shell_n etc._n etc._n but_o the_o best_a way_n be_v to_o plunge_v into_o the_o water_n propose_v or_o lest_o the_o whole_a ball_n or_o globulous_a part_n of_o a_o good_a hermetical_o seal_v thermoscope_n whereon_o the_o degree_n of_o cold_a and_o heat_n be_v careful_o mark_v note_n on_o the_o second_o title_n ii_o the_o knowledge_n of_o the_o specific_a gravity_n of_o a_o mineral_n water_n may_v be_v of_o great_a use_n to_o he_o that_o endeavonr_n to_o discover_v its_o nature_n not_o only_o as_o this_o knowledge_n enable_v he_o to_o distinguish_v the_o propose_a water_n from_o other_o but_o because_o it_o may_v afford_v he_o a_o considerable_a and_o double_a information_n for_o by_o compare_v the_o weight_n of_o the_o propose_a liquor_n with_o that_o of_o common_a water_n he_o may_v be_v in_o case_n the_o former_a be_v heavy_a as_o it_o usual_o happen_v to_o be_v assist_v to_o estimate_v what_o proportion_n of_o salt_n or_o martial_a or_o other_o mineral_n substance_n it_o be_v impregnate_v with_o and_o if_o it_o be_v very_a light_n and_o much_o more_o if_o it_o be_v light_a than_o common_a water_n he_o may_v probable_o conclude_v that_o the_o substance_n that_o impregnate_v it_o be_v either_o very_a small_a in_o quantity_n or_o proportion_n or_o be_v not_o near_o so_o gross_a as_o be_v to_o be_v find_v in_o other_o mineral_n water_n but_o of_o a_o spirituous_a and_o volatile_a nature_n which_o be_v a_o discovery_n of_o no_o small_a moment_n in_o this_o affair_n and_o thó_n that_o may_v seem_v a_o paradox_n which_o i_o here_o suppose_v that_o a_o water_n impregnate_v with_o a_o metalline_a or_o mineral_n substance_n shall_v be_v as_o light_v or_o even_o light_a than_o common_a water_n yet_o upon_o trial_n careful_o make_v i_o have_v find_v some_o mineral_n water_n as_o particular_o that_o of_o tunbridge_n well_o take_v up_o and_o tho'_o they_o be_v somewhat_o less_o light_a that_o of_o the_o german_a spa_n and_o of_o some_o of_o the_o islington_n spring_n to_o be_v manifest_o light_a than_o common_a water_n and_o some_o take_v up_o at_o tun_n bridge_n i_o find_v to_o be_v light_a than_o common_a water_n even_o purify_v by_o distillation_n and_o tho'_o it_o be_v very_o hard_a to_o conceive_v yet_o i_o think_v it_o not_o impossible_a that_o a_o subterreneal_a substance_n that_o impregnate_v water_n shall_v be_v light_a in_o specie_fw-la than_o it_o but_o yet_o i_o will_v not_o refer_v this_o surprise_v levity_n in_o all_o case_n nor_o all_o of_o it_o in_o most_o case_n to_o the_o admixture_n of_o light_a corpuscle_n because_o some_o trial_n justify_v the_o suspicion_n i_o have_v that_o much_o of_o the_o comparative_a lightness_n proceed_v from_o this_o that_o the_o mineral_n water_n be_v imbue_v with_o a_o small_a quantity_n of_o vulgar_a or_o culinary_a salt_n than_o common_a water_n use_v to_o contain_v but_o yet_o these_o trial_n do_v not_o satisfy_v i_o that_o this_o paucity_n of_o common_a salt_n be_v the_o sole_a or_o adequate_a cause_n of_o the_o lightness_n of_o the_o mention_a water_n but_o to_o discover_v such_o minute_n difference_n one_o must_v have_v good_a instrument_n and_o indeed_o to_o speak_v free_o there_o be_v few_o upon_o who_o report_n i_o dare_v confident_o rely_v for_o the_o specific_a gravity_n of_o mineral_n water_n for_o to_o weigh_v liquor_n any_o thing_n exact_o there_o be_v requisite_a more_o heedfulness_n and_o more_o skill_n and_o better_a instrument_n than_o be_v easy_a to_o be_v meet_v with_o together_o and_o than_o we_o usual_o imagine_v and_o when_o physician_n and_o other_o weigh_v mineral_n water_n they_o be_v wont_n to_o do_v it_o in_o some_o apothecary_n or_o other_o trade_n man_v shop_n where_o if_o the_o balance_n be_v small_a the_o vessel_n and_o the_o water_n be_v common_o too_o heavy_a for_o they_o and_o oftentimes_o wrong_v they_o and_o if_o as_o be_v usual_a the_o bottle_n or_o other_o vessel_n be_v great_a they_o require_v far_o better_a balance_n than_o be_v usual_o employ_v in_o the_o shop_n of_o apothecary_n or_o grocer_n who_o balance_n a_o critical_a examiner_n will_v too_o often_o find_v to_o be_v far_o from_o be_v accurate_a insomuch_o that_o usual_o without_o at_o all_o alter_v the_o weight_n tho'_o perhaps_o not_o great_a one_o he_o may_v easy_o make_v which_o scale_n he_o please_v manifest_o preponderate_a and_o continue_v in_o that_o position_n and_o may_v as_o easy_o afterward_o give_v the_o other_o scale_v the_o same_o advantage_n the_o diligent_a and_o experience_a mathematician_n mersennus_n much_o complain_v of_o the_o difficulty_n he_o find_v to_o weigh_v liquor_n exact_o even_o by_o the_o help_n of_o his_o nice_a instrument_n the_o accurate_a way_n i_o know_v be_v by_o compare_v the_o differ_a weight_n that_o the_o same_o sink_a body_n have_v in_o common_a water_n and_o in_o the_o liquor_n propose_v but_o this_o way_n which_o i_o elsewhere_o circumstantial_o deliver_v require_v beside_o good_a instrument_n skill_n in_o hydrostaticks_n be_v practicable_a but_o by_o few_o and_o the_o way_n of_o compare_v water_n by_o the_o great_a or_o lesser_a sink_n of_o the_o same_o cylinder_n or_o other_o swim_a body_n into_o they_o be_v scarce_o accurate_a enough_o wherefore_o i_o choose_v to_o make_v a_o very_a skilful_a artist_n blow_n at_o the_o flame_n of_o a_o great_a lamp_n a_o thin_a round_a vial_n with_o a_o flattish_a bottom_n that_o it_o may_v stand_v upright_o and_o be_v very_a light_n and_o this_o be_v furnish_v with_o a_o neck_n as_o large_a as_o a_o goose_n quill_n draw_v very_o even_o into_o a_o hollow_a cylinder_n of_o above_o 3_o inch_n long_o and_o fit_v at_o the_o top_n with_o a_o little_a gap_n that_o hinder_v the_o water_n from_o ascend_v above_o the_o due_a height_n this_o glass_n contain_v ℥_o iiiss_n and_o 43_o grain_n of_o common_a water_n and_o yet_o when_o empty_a weigh_v but_o ʒvi+_n 42_o grain_n so_o that_o i_o can_v use_v it_o when_o full_a of_o liquor_n in_o such_o a_o balance_n that_o the_o addition_n or_o detraction_n of_o half_a a_o grain_n or_o less_o will_v make_v either_o scale_n preponderate_a the_o length_n and_o evenness_n of_o the_o stem_n be_v design_v for_o use_n not_o needful_a to_o be_v mention_v here_o where_o it_o may_v suffice_v for_o my_o purpose_n to_o say_v that_o this_o glass_n be_v judge_v capable_a of_o hold_v water_n enough_o for_o not_o uncurious_a trial_n and_o yet_o not_o to_o be_v tho'_o well_o fill_v too_o heavy_a for_o a_o tender_a balance_n in_o this_o vessel_n herefore_o we_o careful_o weigh_v several_a liquor_n who_o gravity_n belong_v not_o to_o this_o place_n and_o among_o they_o diverse_a mineral_n water_n some_o of_o which_o at_o least_o know_v here_o at_o london_n be_v find_v to_o be_v of_o the_o annex_v weight_n the_o glass_n be_v fill_v with_o several_a liquor_n to_o the_o same_o height_n and_o weigh_v in_o the_o same_o balance_n  _fw-fr ounce_n d_o gr_n common_a water_n be_v find_v to_o weigh_v 3_o 4_o 43_o common_a water_n distil_v 3_o 4_o 41_o acton_n water_n 3_o 4_o 48_o ½_o epsom_n water_n 3_o 4_o 51_o dulledge_n water_n 2_o 4_o 54_o straton_n water_n 3_o 4_o 55_o barnet_n water_n 3_o 4_o 52_o north-hall_n water_n 3_o 4_o 50_o the_o german_a spa_n water_n 3_o 4_o 40_o tunbridge_n water_n 3_o 4_o 38_o islington_n water_n from_o the_o music_n house_n 3_o 4_o 36_o islington_n water_n from_o the_o vault_n with_o step_n 3_o 4_o 39_o islington_n water_n from_o the_o cellar_n 3_o 4_o 39_o by_o this_o short_a account_n it_o may_v appear_v that_o as_o divers_a mineral_n water_n that_o contain_v salt_n in_o they_o be_v considerable_o heavy_a than_o common_a water_n so_o some_o especial_o ferruginous_a water_n be_v impregnate_v with_o so_o fine_a a_o substance_n as_o to_o be_v light_a than_o common_a water_n note_n on_o the_o four_o title_n iv._o this_o article_n may_v in_o divers_a case_n give_v some_o light_n to_o the_o discovery_n of_o the_o kind_n of_o soil_n through_o which_o the_o water_n have_v pass_v and_o be_v also_o useful_a to_o distinguish_v the_o spontaneous_a residence_n if_o i_o may_v so_o call_v it_o that_o the_o liquor_n le_fw-fr we_o fall_v by_o mere_a stand_n from_o that_o which_o they_o call_v the_o caput_fw-la mortuum_n that_o remain_v after_o the_o total_a evaporation_n of_o the_o water_n by_o which_o mean_v also_o the_o weight_n of_o this_o last_o residence_n may_v be_v more_o true_o know_v beside_o some_o other_o mineral_n water_n i_o find_v that_o the_o german_a spa_n water_n bring_v very_o well_o stop_v to_o london_n afford_v by_o
take_v for_o grant_v viz._n that_o the_o infusion_n of_o gall_n will_v certain_o discover_v by_o become_v black_a or_o purple_a if_o a_o mineral_n water_n that_o be_v mix_v with_o it_o be_v vitriolate_a for_o though_o it_o be_v true_a that_o if_o in_o the_o vitriolated_a water_n iron_n be_v the_o only_a or_o predominant_a mineral_n or_o be_v at_o least_o considerable_o participate_v by_o the_o liquor_n yet_o if_o the_o dissolve_v vit_fw-mi riol_n be_v altogether_o copperish_v i_o find_v by_o several_a trial_n purposely_o make_v with_o a_o strong_a solution_n of_o roman_a vitriol_n wherein_o copper_n be_v affirm_v to_o be_v the_o only_a or_o to_o be_v very_o much_o the_o predominant_a metal_n that_o it_o will_v not_o with_o insusion_n or_o tincture_n of_o gall_n afford_v either_o a_o black_a or_o a_o blackish_a colour_n but_o only_o a_o thick_a and_o muddy_a one_o that_o be_v not_o so_o much_o purplish_a it_o come_v into_o my_o mind_n upon_o this_o occasion_n that_o from_o one_o of_o the_o northern_a country_n of_o england_n where_o there_o be_v divers_a mineral_n water_n there_o be_v bring_v i_o by_o a_o virtuoso_fw-la a_o good_a quantity_n of_o very_a whitish_a earth_n which_o he_o suspect_v to_o be_v of_o a_o peculiar_a nature_n but_o can_v not_o tell_v of_o what_o this_o odd_a earth_n be_v examine_v i_o conclude_v it_o to_o contain_v a_o considerable_a proportion_n of_o lead_v over_o corrode_v by_o some_o mineral_n salt_n and_o embody_v with_o the_o soil_n so_o that_o if_o it_o have_v be_v in_o a_o place_n where_o people_n have_v seek_v for_o mineral_n water_n it_o be_v probable_a that_o find_v some_o peculiarity_n in_o the_o taste_n of_o those_o that_o pass_v through_o this_o earth_n they_o will_v have_v take_v it_o for_o a_o mineral_n water_n but_o have_v be_v at_o a_o great_a loss_n to_o determine_v what_o mineralit_n do_v partake_v of_o and_o perhaps_o in_o endeavour_v to_o resolve_v the_o doubt_n by_o drink_v it_o they_o will_v have_v find_v very_o bad_a effect_n of_o it_o but_o probable_o the_o sulphureous_a spirit_n to_o be_v ere_o long_o describe_v in_o this_o paper_n will_v have_v inform_v they_o that_o the_o water_n be_v impregnate_v with_o a_o body_n of_o the_o nature_n of_o vitriol_n but_o not_o of_o common_a vitriol_n for_o though_o gall_n do_v not_o give_v a_o black_a or_o very_o blackish_a colour_n with_o a_o solution_n of_o saecharum_fw-la saturni_n which_o be_v indeed_o the_o vitriol_n of_o lead_n resolve_v in_o distil_a or_o rain_v water_n yet_o i_o find_v by_o trial_n that_o this_o volatile_a sulphur_n do_v manifest_o and_o present_o do_v it_o which_o trial_n i_o be_v fain_o to_o take_v up_o with_o because_o when_o i_o have_v occasion_n to_o consider_v this_o matter_n i_o have_v not_o at_o hand_n the_o oar_n of_o lead_n copper_n etc._n etc._n and_o therefore_o be_v fain_o to_o content_v myself_o with_o the_o solution_n of_o the_o metal_n themselves_o in_o their_o proper_a menstruum_n it_o be_v probable_a that_o the_o metalline_a part_n of_o the_o oar_n will_v have_v afford_v either_o the_o same_o solution_n or_o some_o very_a like_o they_o in_o the_o same_o menstruum_n which_o consist_v of_o niter_n sea-salt_n &_o vitriol_n body_n that_o abound_v in_o diverse_a place_n of_o the_o earth_n through_o which_o spring_n flow_v the_o impregnated_a water_n will_v afford_v phaenomena_n of_o the_o same_o kind_n i_o make_v trial_n also_o upon_o a_o somewhat_o fine_a solution_n of_o refine_a gold_n make_v in_o a_o aqua_fw-la regalis_fw-la and_o upon_o a_o solution_n of_o common_a run_a mercury_n make_v with_o aqua_fw-la fortis_fw-la and_o in_o a_o clear_a solution_n of_o tin_n make_v not_o with_o either_o of_o the_o forego_n menstruum_n for_o i_o have_v not_o find_v they_o to_o dissolve_v it_o genuine_o but_o in_o a_o peculiar_a solvent_a which_o i_o have_v communicate_v in_o another_o paper_n that_o do_v not_o only_o dissolve_v it_o ready_o but_o keep_v it_o permanent_o dissolve_v as_o aqua_fw-la fortis_fw-la do_v silver_n but_o not_o tin_n to_o these_o solution_n i_o put_v gall_n without_o obtain_v any_o blackish_a colour_n except_o from_o that_o which_o contain_v gold_n but_o with_o our_o sulphureous_a liquor_n we_o produce_v notable_a change_n of_o colour_n and_o those_o in_o all_o the_o solution_n but_o one_o a_o dark_a one_o or_o tend_v to_o blackness_n and_o though_o for_o that_o reason_n a_o careless_a eye_n may_v judge_v they_o indiscriminate_o to_o be_v blackish_a yet_o since_o i_o well_o remember_v that_o the_o degree_n or_o some_o other_o modification_n of_o the_o same_o dark_a colour_n seem_v plain_o enough_o not_o to_o be_v the_o same_o in_o all_o of_o they_o i_o do_v not_o think_v it_o impossible_a but_o that_o a_o very_a heedful_a beholder_n which_o when_o i_o make_v those_o trial_n i_o have_v no_o great_a motive_n to_o be_v may_v discern_v between_o those_o obscure_a colour_n some_o little_a difference_n that_o may_v much_o assist_v he_o to_o guess_v what_o metalline_a substance_n be_v contain_v in_o the_o liquor_n or_o at_o least_o be_v predominant_a in_o it_o if_o it_o be_v a_o compound_a one_o and_o i_o particular_o remember_v that_o the_o colour_n that_o spring_v from_o our_o sulphureous_a liquor_n and_o solution_n of_o tin_n be_v manifest_o distinguishable_a from_o those_o produce_v in_o that_o of_o any_o of_o the_o other_o solution_n be_v not_o black_a or_o blackish_a nor_o so_o much_o as_o purple_a but_o of_o a_o kind_n of_o brownish_a yellow_a though_o i_o be_o content_a that_o the_o thing_n i_o come_v from_o mention_v shall_v make_v man_n cautious_a and_o diffident_a yet_o not_o only_o i_o do_v not_o despise_v or_o slight_v the_o use_n of_o gall_n etc._n etc._n even_o as_o it_o it_o be_v vulgar_o practise_v but_o i_o be_o apt_a to_o think_v that_o the_o way_n of_o explore_a mineral_n water_n by_o the_o change_n of_o colour_n that_o may_v be_v produce_v in_o they_o or_o by_o they_o when_o they_o be_v mingle_v with_o convenient_a drug_n or_o additament_n may_v be_v make_v of_o great_a extent_n and_o use_n than_o he_o that_o have_v read_v what_o i_o have_v write_v in_o the_o forego_n number_n will_v perhaps_o be_v forward_o to_o expect_v but_o to_o make_v the_o way_n of_o explore_a mineral_n water_n by_o coloration_n of_o somewhat_o more_o general_a use_n and_o less_o uncertainty_n i_o will_v recommend_v these_o thing_n to_o the_o experimenter_n 1._o it_o seem_v very_o fit_a if_o not_o necessary_a that_o he_o look_v upon_o the_o change_n of_o colour_n both_o while_n it_o be_v produce_v and_o when_o it_o be_v produce_v in_o a_o good_a light_n and_o with_o a_o heedful_a eye_n for_o by_o this_o mean_v he_o may_v discover_v several_a shade_n or_o variety_n of_o the_o more_o principal_a colour_n and_o some_o other_o circumstance_n that_o he_o can_v not_o else_o take_v notice_n of_o and_o which_o yet_o may_v afford_v good_a hint_n in_o reference_n to_o other_o mineral_n as_o well_o as_o martial_a one_o to_o a_o sagacious_a observer_n and_o i_o have_v sometime_o fancy_v that_o there_o may_v be_v a_o kind_n of_o physio_n gnomy_n of_o many_o if_o not_o most_o other_o natural_a body_n as_o well_o as_o of_o humane_a face_n whereby_o a_o attentive_a and_o experience_a considerer_n may_v himself_o discern_v in_o they_o many_o instructive_a thing_n that_o he_o can_v so_o declare_v to_o another_o man_n as_o to_o make_v he_o discern_v they_o too_o 2._o the_o attention_n here_o encourage_v may_v perhaps_o be_v make_v more_o instructive_a by_o a_o way_n that_o i_o have_v sometime_o practise_v to_o vary_v the_o shade_n and_o other_o phaenomena_n of_o colour_n produce_v with_o mineral_n liquor_n this_o way_n consist_v chiefl_o in_o prepare_v sheet_n of_o white_a paper_n by_o drench_a they_o in_o a_o strong_a infusion_n of_o brasil_n log-wood_n or_o some_o other_o convenient_a die_a stuff_n and_o then_o let_v they_o dry_a leisurely_o in_o the_o air_n which_o may_v give_v some_o of_o they_o as_o i_o have_v observe_v a_o colour_n differ_v enough_o from_o that_o of_o the_o liquor_n look_v upon_o in_o a_o vial_n or_o drink_a glass_n upon_o this_o dry_a paper_n you_o may_v let_v fall_n but_o not_o all_o on_o the_o same_o place_n some_o drop_n of_o the_o mineral_n liquor_n to_o be_v examine_v especial_o if_o it_o be_v of_o a_o saline_n nature_n and_o by_o the_o change_n of_o colour_n effect_v by_o these_o drop_n on_o the_o part_n of_o the_o paper_n they_o fall_v and_o spread_v themselves_o upon_o a_o heedful_a observer_n may_v be_v assist_v to_o guess_v what_o kind_n of_o mineral_n impregnate_v the_o liquor_n and_o how_o much_o it_o do_v so_o especial_o if_o on_o the_o same_o sheet_n of_o paper_n some_o other_o fit_a mineral_n water_n or_o idoneous_a liquor_n be_v likewise_o drop_v that_o the_o change_n of_o colour_n produce_v by_o the_o two_o fluid_n may_v be_v survey_v and_o
compare_v together_o i_o also_o practise_v another_o way_n somewhat_o differ_v from_o this_o as_o the_o main_a part_n of_o which_o we_o prepare_v white_a paper_n by_o rub_v well_o upon_o it_o with_o a_o hare_n foot_n or_o some_o such_o thing_n some_o idoneous_a powder_n especial_o that_o of_o vitriol_n whereof_o for_o this_o purpose_n english_a seem_v the_o best_a light_o calcine_v in_o a_o gentle_a heat_n till_o it_o become_v of_o a_o grayish_a colour_n and_o friable_a between_o the_o finger_n by_o this_o mean_n it_o be_v easy_a to_o make_v the_o paper_n fit_a for_o our_o turn_n for_o the_o fine_a part_n have_v lodge_v themselves_o in_o its_o pore_n without_o much_o discolour_n it_o when_o the_o supersluous_a dust_n be_v strike_v off_o it_o become_v capable_a of_o afford_v a_o variety_n of_o colour_n or_o rather_o shade_n some_o deep_a and_o some_o faint_a when_o i_o let_v fall_n on_o it_o some_o drop_n of_o differ_v martial_a liquor_n but_o of_o the_o examen_fw-la of_o the_o materia_fw-la medica_fw-la by_o the_o change_n of_o colour_n produce_v in_o it_o or_o by_o it_o more_o be_v say_v in_o another_o paper_n and_o therefore_o instead_o of_o transfer_v that_o hither_o i_o shall_v here_o brief_o intimate_v that_o divers_a variation_n of_o colour_n may_v be_v make_v either_o by_o infuse_v or_o otherwise_o mix_v as_o i_o have_v sometime_o do_v something_o in_o the_o mineral_n water_n before_o the_o ting_a stuff_n be_v put_v to_o it_o or_o by_o put_v somewhat_o in_o the_o infusion_n or_o powder_n of_o gall_n before_o it_o be_v mix_v with_o the_o mineral_n water_n or_o else_o by_o drop_v fit_a liquor_n such_o as_o spirit_n of_o salt_n first_o and_o then_o spirit_n of_o urine_n or_o oil_n of_o tartar_n into_o the_o blackish_a or_o purple_a mixture_n of_o gall_n and_o the_o medicinal_a water_n to_o be_v examine_v for_o by_o these_o mean_v diverse_a variation_n of_o colour_n may_v be_v observe_v which_o together_o with_o some_o other_o way_n that_o i_o have_v make_v use_n of_o to_o multiply_v they_o i_o have_v not_o now_o leisure_n to_o set_v down_o 3._o it_o be_v not_o convenient_a to_o confine_v one_o self_n to_o the_o use_n either_o of_o gall_n or_o oaken_a leave_n but_o to_o make_v use_n also_o of_o red_a rose_n balaustium_fw-la log-wood_n brasil_n and_o other_o astringent_a vegetable_a pigment_n for_o though_o some_o of_o these_o give_v a_o deep_a tincture_n than_o gall_n yet_o by_o the_o diversity_n of_o colour_n produce_v by_o they_o in_o mineral_n water_n a_o attentive_a beholder_n may_v as_o be_v late_o intimate_v where_o i_o mention_v diversity_n of_o light_n and_o shade_n discover_v some_o thing_n that_o he_o will_v not_o be_v inform_v of_o or_o receive_v any_o hint_n of_o by_o the_o help_n of_o gall_n of_o oaken_a leave_n alone_o nay_o i_o will_v not_o have_v our_o experimenter_n employ_v none_o but_o vegetable_a substance_n about_o his_o coloration_n but_o sometime_o make_v use_n of_o animal_n one_o and_o more_o often_o of_o mineral_n since_o by_o this_o mean_v he_o may_v much_o diversify_v his_o trial_n and_o increase_v the_o number_n of_o phaenomena_n some_o of_o which_o he_o may_v probable_o find_v instructive_a beside_o astringent_a plant_n i_o have_v find_v and_o sometime_o devise_v other_o substance_n that_o will_v turn_v black_a as_o well_o as_o gall_n with_o vitriolated_a water_n and_o that_o not_o only_o with_o those_o that_o be_v rich_o impregnate_v with_o iron_n but_o also_o with_o those_o wherein_o copper_n alone_o abound_v as_o in_o roman_a vitriol_n and_o though_o for_o certain_a reason_n i_o must_v not_o now_o set_v down_o a_o way_n i_o have_v to_o discover_v in_o a_o trice_n both_o these_o vitriol_n without_o any_o liquor_n or_o tangible_a body_n yet_o i_o shall_v subjoin_v as_o a_o kind_n of_o succedaneum_n that_o may_v suffice_v for_o the_o present_a occasion_n the_o way_n of_o make_v a_o liquor_n that_o will_v present_o turn_v black_a with_o a_o solution_n either_o of_o martial_a or_o cupreous_a vitriol_n take_v equal_a part_n of_o pure_a salt_n of_o tartar_n and_o either_o flower_n of_o sulphur_n or_o at_o least_o sulphur_n fine_o powder_v and_o good_a sal-armoniac_a reduce_v the_o first_o and_o the_o last_o to_o powder_v separately_z melt_v the_o sulphur_n over_o a_o gentle_a fire_n and_o by_o degree_n put_v to_o it_o the_o salt_n of_o tartar_n stir_v they_o well_o to_o make_v they_o incorporate_v and_o grow_v red_a or_o red_a then_o put_v this_o mixture_n pulverise_v into_o a_o glass_n retort_n or_o a_o cucurbite_n and_o pour_v on_o it_o the_o sal-armoniac_a dissolve_v in_o fair_a water_n and_o close_v well_o the_o juncture_n distil_v all_o in_o sand_n by_o degree_n of_o a_o moderate_a fire_n shift_v the_o receiver_n once_o or_o twice_o because_o the_o liquor_n will_v be_v differ_o tinged_a and_o strong_a and_o that_o which_o ascend_v last_o may_v bring_v over_o but_o very_o little_a of_o the_o sulphur_n who_o volatile_a tincture_n be_v yet_o the_o main_a thing_n we_o aim_v at_o in_o this_o operation_n 4._o i_o do_v not_o despair_v but_o that_o he_o who_o be_v able_a to_o make_v a_o skilful_a use_n of_o the_o several_a drug_n and_o other_o body_n vegetable_a animal_n and_o mineral_n that_o may_v produce_v new_a colour_n in_o or_o with_o mineral_n water_n or_o in_o some_o case_n with_o the_o substance_n that_o impregnate_n they_o may_v by_o their_o mean_n be_v also_o enable_v to_o discover_v the_o presence_n or_o inexistence_n of_o divers_a other_o mineral_n some_o of_o they_o salubrious_a or_o at_o least_o safe_a and_o some_o other_o either_o hurtful_a or_o at_o least_o dangerous_a that_o be_v not_o take_v notice_n of_o by_o those_o that_o content_n themselves_o to_o employ_v gall_n and_o oaken_a leave_n in_o the_o exploration_n of_o the_o water_n they_o examine_v for_o some_o of_o these_o liquor_n contain_v salt_n that_o have_v not_o corrode_v either_o martial_a or_o cupreous_a oar_n or_o marcasite_n do_v not_o betray_v themselves_o by_o produce_v either_o a_o inky_a or_o a_o faint_a degree_n of_o blackness_n or_o else_o a_o purple_a with_o the_o drug_n make_v use_v of_o to_o change_v their_o colour_n ofthese_fw-mi salt_n i_o have_v meet_v with_o more_o than_o one_o sort_n which_o may_v be_v more_o proper_o take_v notice_n of_o when_o we_o consider_v the_o mineral_n water_n and_o its_o content_n 12._o i_o think_v it_o likewise_o very_o possible_a that_o industrious_a man_n shall_v find_v way_n to_o discover_v by_o the_o help_n of_o the_o change_n of_o colour_n whether_o orpiment_n or_o native_a arsenic_n or_o the_o like_a poisonous_a mineral_n do_v so_o impregnate_n the_o water_n propose_v as_o to_o make_v it_o very_o hurtful_a or_o dangerous_a tho'_o not_o absolute_o pernicious_a and_o as_o for_o sulphur_n there_o may_v be_v several_a water_n that_o partake_v of_o it_o without_o be_v take_v notice_n of_o to_o do_v so_o for_o i_o remember_v that_o i_o have_v sometime_o purposely_o make_v a_o liquor_n that_o be_v limpid_a and_o colourless_a like_o spring_n water_n and_o which_o will_v total_o fly_v up_o even_o with_o a_o gentle_a heat_n and_o yet_o this_o liquor_n be_v rich_o impregnate_v with_o a_o mineral_n sulphur_n as_o i_o convince_v several_a virtuoso_n by_o manifest_a and_o ocular_a proof_n so_o that_o if_o sulphur_n chance_v to_o be_v combine_v with_o any_o salt_n or_o mineral_n of_o those_o many_o subterraneal_a one_o that_o nature_n have_v hide_v from_o we_o that_o can_v suppress_v or_o disguise_v its_o peculiar_a odour_n the_o water_n may_v be_v considerable_o and_o yet_o unobserved_o impregnate_v with_o it_o and_o yet_o it_o be_v like_o this_o may_v easy_o be_v discover_v by_o the_o change_n of_o colour_n producible_a in_o such_o a_o sulphureous_a liquor_n by_o vitriolate_a body_n and_o other_o appropriate_a additament_n which_o may_v be_v think_v the_o more_o probable_a because_o tho'_o the_o spirit_n late_o describe_v be_v very_o transparent_a and_o total_o volatile_a in_o the_o form_n of_o a_o liquor_n sometime_o pale_a enough_o yet_o common_a english_a vitriol_n as_o also_o that_o of_o danzick_n which_o be_v venereal_a will_v present_o turn_v it_o of_o a_o black_a or_o very_o dark_a colour_n and_o to_o add_v here_o something_o more_o difficult_a to_o be_v perform_v i_o have_v devise_v a_o way_n which_o range_v i_o elsewhere_o deliver_v whereby_o it_o may_v appear_v that_o even_a copper_n that_o have_v be_v melt_v into_o a_o body_n may_v be_v so_o subtilise_v and_o disguise_v as_o to_o have_v a_o multitude_n of_o its_o metalline_a part_n make_v to_o ascend_v with_o other_o in_o the_o form_n of_o a_o transparent_a liquor_n like_o common_a water_n and_o yet_o by_o put_v to_o it_o a_o little_a of_o another_o substance_n as_o volatile_a and_o colourless_a as_o itself_o it_o will_v present_o disclose_v the_o copper_n it_o contain_v by_o turn_v blue_a as_o a_o saphire_n 13._o because_o arsenic_n be_v