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 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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 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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
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
remember_v i_o have_v yet_o meet_v with_o any_o wherein_o a_o alcaly_a be_v predominant_a 4._o but_o perhaps_o far_o inquiry_n will_v discover_v to_o other_o here_o in_o england_n what_o i_o have_v not_o yet_o meet_v with_o and_o i_o doubt_v not_o but_o that_o there_o be_v in_o divers_a place_n of_o the_o earth_n salt_n of_o a_o alcalisate_n nature_n and_o i_o presume_v that_o if_o the_o egyptian_n be_v any_o thing_n curious_a of_o such_o thing_n they_o will_v find_v among_o their_o spring_n or_o well_n divers_a water_n impregnate_v with_o they_o for_o i_o find_v by_o trial_n purposely_o make_v upon_o latron_n as_o some_o know_a man_n call_v the_o true_a egyptian_a niter_n present_v i_o by_o a_o inquisitive_a ambassador_n who_o come_v out_o of_o the_o east_n that_o the_o native_a salt_n exhibit_v divers_a of_o the_o same_o phaenomena_n that_o other_o factitious_a alcali_n do_v and_o some_o salt_n afford_v by_o the_o famous_a water_n of_o bourbon_n in_o france_n be_v bring_v i_o thence_o with_o a_o desire_n that_o i_o will_v examine_v it_o i_o find_v it_o to_o be_v evident_o alcalisate_n insomuch_o that_o it_o will_v make_v a_o conflict_n with_o acid_n and_o present_o turn_v syrup_n of_o violet_n green_a 5._o if_o we_o suspect_v vitriol_n to_o be_v much_o predominant_a in_o the_o saline_n part_n of_o a_o mineral_n water_n we_o may_v endeavour_v to_o discover_v it_o by_o such_o way_n as_o these_o by_o its_o blacken_n a_o solution_n of_o gall_n by_o its_o vomitive_a operation_n upon_o the_o drinker_n tho'_o this_o may_v sometime_o be_v a_o uncertain_a way_n especial_o because_o a_o invisible_a permixture_n of_o arsenic_n or_o or_o perhaps_o arsenical_a fume_n may_v give_v the_o water_n they_o impregnate_n a_o emetic_n quality_n by_o put_v alcali_n to_o a_o strong_a solution_n of_o the_o suppose_a vitriol_n and_o observe_v whether_o it_o will_v afford_v a_o yellow_a or_o yellowish_a precipitate_v if_o salt_n of_o tartar_n or_o spirit_n of_o urine_n be_v drop_v into_o it_o by_o take_v notice_n whether_o a_o sulphureous_a spirit_n especial_o such_o a_o one_o as_o i_o former_o tell_v i_o have_v make_v tho'_o not_o here_o describe_v will_v make_v a_o blackish_a or_o a_o very_a dark_a colour_n with_o it_o as_o i_o first_o guess_v and_o then_o find_v it_o will_v do_v with_o several_a vitriolate_a liquor_n and_o even_o with_o one_o to_o make_v which_o we_o have_v dissolve_v but_o one_o grain_n of_o a_o natural_a vitriolate_a substance_n in_o above_o four_o or_o five_o thousand_o time_n its_o weight_n of_o syrup_n or_o water_n but_o in_o the_o part_n about_o london_n i_o remember_v not_o that_o in_o any_o of_o the_o water_n i_o have_v make_v trial_n on_o i_o have_v find_v vitriol_n to_o be_v predominant_a or_o to_o be_v so_o much_o as_o a_o manifest_a ingredient_n which_o seem_v to_o i_o the_o more_o remarkable_a because_o several_a part_n about_o this_o city_n be_v not_o destitute_a of_o marcasite_n the_o parent_n or_o womb_n of_o vitriol_n since_o the_o write_n of_o these_o paper_n be_v casual_o visit_v by_o a_o discern_a stranger_n who_o have_v a_o particular_a occasion_n to_o take_v notice_n of_o the_o residence_n of_o many_o of_o the_o mineral_n water_n of_o france_n his_o native_a country_n he_o answer_v i_o that_o he_o never_o meet_v with_o any_o that_o be_v manifest_o vitriolate_v and_o he_o seem_v to_o be_v of_o opinion_n that_o no_o vitriolate_a spring_n have_v yet_o be_v discover_v among_o the_o many_o mineral_n one_o that_o be_v know_v to_o be_v in_o that_o country_n 7._o since_o we_o so_o rare_o meet_v with_o either_o manifest_o acid_n or_o evident_o alcalisate_n salt_n in_o our_o english_a mineral_n water_n it_o may_v deserve_v a_o serious_a inquiry_n what_o other_o salt_n they_o may_v be_v impregnate_v with_o and_o especial_o from_o what_o salt_n the_o purgative_n virtue_n that_o be_v find_v to_o belong_v to_o many_o of_o they_o as_o epsom_n barnet_n acton_n etc._n etc._n do_v proceed_v common_a salt_n indeed_o as_o be_v already_o note_v i_o have_v find_v token_n of_o in_o the_o german_a spa_n water_n and_o in_o all_o the_o english_a mineral_n water_n i_o have_v occasion_n to_o try_v not_o one_o that_o i_o remember_v except_v but_o i_o do_v not_o find_v that_o common_a salt_n be_v so_o copious_a in_o any_o of_o they_o as_o to_o disclose_v it_o self_n by_o chrystallize_a in_o cubical_a grain_n and_o the_o way_n i_o make_v use_v of_o to_o examine_v the_o saltness_n of_o the_o water_n without_o crystallization_n be_v not_o equal_o certain_a in_o all_o sort_n of_o they_o and_o because_o i_o have_v not_o store_n enough_o of_o these_o liquor_n to_o evaporate_v they_o in_o large_a quantity_n tho'_o i_o can_v not_o discern_v in_o the_o clear_a salt_n they_o afford_v either_o vitriol_n or_o salt_n peter_n or_o allom_n or_o even_o common_a salt_n by_o their_o peculiar_a and_o genuine_a figure_n yet_o i_o dare_v not_o confident_o say_v that_o none_o of_o our_o english_a mineral_n spring_n abound_v with_o any_o of_o those_o salt_n but_o as_o far_o as_o i_o can_v guess_v by_o the_o trial_n that_o i_o have_v hitherto_o have_v opportunity_n to_o make_v i_o be_o apt_a to_o think_v that_o the_o salt_n that_o be_v find_v in_o our_o purgative_n water_n and_o and_o in_o some_o of_o they_o copious_o enough_o do_v not_o belong_v to_o any_o one_o know_a sort_n of_o salt_n but_o be_v either_o of_o a_o sort_n for_o which_o as_o for_o many_o other_o mineral_n we_o have_v yet_o no_o name_n or_o which_o seem_v more_o probable_a be_v a_o salt_n of_o a_o compound_a nature_n make_v up_o by_o the_o coalition_n of_o some_o or_o all_o of_o the_o salt_n above_o mention_v and_o perhaps_o of_o some_o other_o as_o yet_o nameless_a subterraneal_a salt_n that_o the_o spring_n inssolve_v in_o its_o passage_n that_o two_o body_n which_o be_v neither_o of_o they_o cathartic_a may_v by_o a_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 i_o have_v show_v in_o another_o paper_n beside_o have_v former_o have_v occasion_n in_o order_n to_o the_o resolution_n of_o a_o certain_a doubt_n i_o have_v entertain_v to_o burn_v salt_n of_o tartar_n with_o about_o a_o double_a weight_n of_o common_a sulphur_n i_o thence_o obtain_v as_o i_o expect_v a_o neutral_a salt_n that_o have_v peculiar_a quality_n differ_v from_o those_o of_o the_o body_n employ_v to_o make_v it_o up_o and_o talk_v of_o this_o salt_n with_o a_o ingenious_a empiric_n he_o tell_v i_o it_o have_v a_o quality_n i_o have_v not_o mention_v and_o that_o a_o very_a useful_a one_o since_o in_o the_o dose_n of_o half_a a_o dram_n or_o in_o some_o body_n be_v take_v in_o wine_n or_o broth_n it_o will_v considerable_o and_o yet_o gentle_o and_o without_o gripe_n purge_v and_o without_o the_o help_n of_o salt_n of_o tartar_n have_v sometime_o make_v out_o of_o common_a sulphur_n a_o crystalline_a salt_n of_o a_o somewhat_o vitriolate_a taste_n the_o like_a to_o which_o may_v possible_o be_v make_v under_o ground_n where_o there_o be_v subterraneal_a fire_n though_o perhaps_o not_o observe_v nor_o suspect_v since_o we_o make_v this_o salt_n without_o add_v any_o thing_n to_o the_o sulphur_n only_o by_o the_o help_n of_o fire_n and_o common_a water_n and_o i_o remember_v that_o a_o great_a virtuoso_fw-la several_a year_n ago_o bring_v i_o in_o order_n to_o a_o examen_fw-la he_o desire_v i_o shall_v make_v of_o it_o a_o certain_a salt_n afford_v by_o a_o spring_n in_o or_o near_o his_o land_n which_o i_o remember_v be_v in_o the_o west_n of_o england_n though_o i_o have_v forget_v the_o name_n of_o the_o county_n which_o salt_n no_o body_n know_v what_o to_o make_v of_o but_o i_o quick_o tell_v he_o i_o take_v it_o to_o be_v of_o the_o nature_n of_o the_o sal_fw-la mirabile_fw-la glauberi_fw-la and_o predict_v that_o in_o such_o trial_n it_o will_v afford_v such_o and_o such_o phaenomena_n which_o according_o come_v to_o pass_v and_o i_o think_v that_o if_o opportunity_n have_v not_o be_v want_v this_o salt_n will_v have_v appear_v purgative_n as_o some_o factitious_a salt_n that_o resemble_v it_o in_o transparency_n colourlesness_n and_o figure_n have_v be_v observe_v to_o be_v note_n on_o the_o twenty_o seven_o title_n 1._o it_o be_v surprise_v to_o observe_v how_o great_a a_o inequality_n one_o may_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_v mineral_n water_n bear_v to_o the_o caput_fw-la mortuum_n they_o respective_o afford_v for_o a_o pound_n for_o instance_n of_o one_o may_v after_o evaporation_n leave_v behind_o it_o perhaps_o more_o dram_n of_o dry_a substance_n than_o a_o pound_n of_o the_o other_o will_v leave_v behind_o it_o grain_n but_o because_o i_o have_v no_o note_n of_o the_o considerabl_a instance_n of_o