and_o be_v contain_v many_o time_n in_o the_o bigness_n of_o the_o sight_n of_o a_o man_n eye_n out_o of_o which_o we_o may_v gather_v what_o a_o infinity_n of_o object_n may_v seem_v unto_o we_o to_o cross_v themselves_o in_o the_o same_o indivisible_a place_n and_o yet_o may_v have_v room_n sufficient_a for_o every_o one_o to_o pass_v his_o way_n without_o hinder_v his_o fellow_n wherefore_o see_v that_o one_o single_a light_n can_v not_o send_v ray_n enough_o to_o fill_v every_o little_a space_n of_o air_n that_o be_v capable_a of_o light_n and_o the_o less_o the_o further_a it_o be_v from_o the_o flame_n it_o be_v obvious_a enough_o to_o conceive_v how_o in_o the_o space_n where_o the_o air_n be_v there_o be_v capacity_n for_o the_o ray_n of_o many_o candle_n which_o be_v well_o sum_v up_o will_v take_v away_o the_o great_a admiration_n how_o the_o beam_n of_o light_n though_o they_o be_v corporeal_a can_v in_o such_o great_a multitude_n without_o hinder_v one_o a_o other_o enter_v into_o body_n and_o come_v to_o our_o eye_n and_o will_v show_v that_o it_o be_v the_o narrowness_n of_o our_o capacity_n and_o not_o the_o defect_n of_o nature_n which_o make_v these_o difficulty_n seem_v so_o great_a for_o she_o have_v sufficient_o provide_v for_o all_o these_o subtle_a operation_n of_o fire_n as_o also_o for_o the_o entrance_n of_o it_o into_o glass_n and_o into_o all_o other_o solid_a body_n that_o be_v diaphanous_a upon_o which_o be_v ground_v the_o last_o instance_n the_o second_o objection_n press_v for_o all_o such_o body_n be_v constitute_v by_o the_o operation_n of_o fire_n which_o be_v always_o in_o motion_n there_o must_v needs_o be_v way_n leave_v for_o it_o both_o to_o enter_v in_o and_o to_o evaporate_v out_o and_o this_o be_v most_o evident_a in_o glass_n which_o be_v wrought_v by_o a_o extreme_a violent_a fire_n and_o swell_a with_o it_o as_o water_n and_o other_o thing_n do_v by_o the_o mixture_n of_o fire_n must_v necessary_o have_v great_a store_n of_o fire_n in_o itself_o while_o it_o be_v boil_v as_o we_o see_v by_o its_o be_v red_a hot_a and_o hence_o it_o be_v that_o the_o workman_n be_v force_v to_o let_v it_o cool_v by_o degree_n in_o such_o relentinge_n of_o fire_n as_o they_o call_v their_o neal_a heat_n lest_o it_o shall_v shiver_v in_o piece_n by_o a_o violent_a succeed_a of_o air_n in_o the_o room_n of_o the_o fire_n for_o that_o be_v of_o great_a part_n than_o the_o fire_n will_v strain_v the_o pore_n of_o the_o glass_n too_o soddain_o and_o break_v it_o all_o in_o piece_n to_o get_v ingression_n whereas_o in_o those_o neal_a heat_n the_o air_n be_v rare_a lesser_a part_n of_o it_o succeed_v to_o the_o fire_n and_o leisurely_o stretch_v the_o pore_n without_o hurt_n and_o therefore_o we_o need_v not_o wonder_v that_o light_n pass_v so_o easy_o through_o glass_n and_o much_o less_o that_o it_o get_v through_o other_o body_n see_v the_o experience_n of_o alchemisst_n do_v assure_v we_o that_o it_o be_v hard_o to_o find_v any_o other_o body_n so_o impenetrable_a as_o glass_n sense_n but_o now_o to_o come_v to_o the_o answer_n of_o the_o first_o and_o in_o appearance_n most_o powerful_a objection_n against_o the_o corporeity_n of_o light_n which_o urge_v that_o his_o motion_n be_v perform_v in_o a_o instant_n and_o therefore_o can_v not_o belong_v to_o what_o be_v material_a and_o clothe_v with_o quantity_n we_o will_v endeavour_v to_o show_v how_o unable_a the_o sense_n be_v to_o judge_v of_o sundry_a sort_n of_o motion_n of_o body_n and_o how_o gross_o it_o be_v mistake_v in_o they_o and_o then_o when_o it_o shall_v appear_v that_o the_o motion_n of_o light_n must_v necessary_o be_v hard_o to_o be_v observe_v then_o those_o other_o i_o conceive_v all_o that_o be_v raise_v against_o our_o opinion_n by_o so_o incompetent_a a_o judge_n will_v fall_v flat_a to_o the_o ground_n first_o then_o let_v i_o put_v the_o reader_n in_o mind_n how_o if_o ever_o he_o mark_v child_n when_o they_o play_v with_o firesticke_n they_o move_v and_o whirl_v they_o round_o so_o fast_o that_o the_o motion_n will_v cozen_v their_o eye_n and_o represent_v a_o entire_a circle_n of_o fire_n unto_o they_o and_o be_v it_o somewhat_o distant_a in_o a_o dark_a night_n that_o one_o play_v so_o with_o a_o light_a torch_n it_o will_v appear_v a_o constant_a wheel_n of_o fire_n without_o any_o discern_a of_o motion_n in_o it_o and_o then_o let_v he_o consider_v how_o slow_a a_o motion_n that_o be_v in_o respect_n of_o what_o it_o be_v possible_a a_o body_n may_v participate_v of_o and_o he_o may_v safe_o conclude_v that_o it_o be_v no_o wonder_n though_o the_o motion_n of_o light_n be_v not_o descry_v and_o that_o indeed_o no_o argument_n can_v be_v make_v from_o thence_o to_o prove_v that_o light_n be_v not_o a_o body_n but_o let_v we_o examine_v this_o consideration_n a_o little_a further_o and_o compare_v it_o to_o the_o motion_n of_o the_o earth_n or_o heaven_n let_v the_o appear_a circle_n of_o the_o fire_n be_v some_o three_o foot_n diameter_n and_o the_o time_n of_o one_o entire_a circulation_n of_o it_o be_v the_o sixty_v part_n of_o a_o minute_n of_o which_o minute_n there_o be_v 60._o in_o a_o hour_n so_o that_o in_o a_o whole_a day_n there_o will_v be_v but_o 86400._o of_o these_o part_n of_o time_n now_o the_o diameter_n of_o the_o wheel_n of_o fire_n be_v but_o of_o three_o foot_n the_o whole_a quantity_n of_o space_n that_o it_o move_v in_o that_o atom_n of_o time_n will_v be_v at_o the_o most_o 10._o foot_n which_o be_v three_o pace_n and_o a_o foot_n of_o which_o part_n there_o be_v near_o eleven_o million_o in_o the_o compass_n of_o the_o earth_n so_o that_o if_o the_o earth_n be_v move_v round_o in_o 24._o hour_n it_o must_v go_v near_o 130._o time_n as_o fast_o as_o the_o boy_n stick_v do_v which_o by_o its_o swift_a motion_n deceive_v our_o eye_n but_o if_o we_o allow_v the_o sun_n the_o moon_n and_o the_o fix_a star_n to_o move_v how_o extreme_a swift_a must_v their_o flight_n be_v and_o how_o imperceptible_a will_v their_o motion_n be_v in_o such_o a_o compass_n as_o our_o sight_n will_v reach_v unto_o and_o this_o be_v certain_a that_o whether_o the_o earth_n or_o they_o do_v move_v the_o appearance_n to_o we_o be_v the_o same_o it_o be_v evident_a that_o as_o now_o they_o can_v not_o be_v perceive_v to_o move_v as_o peradventure_o they_o do_v not_o so_o it_o will_v be_v the_o very_a same_o in_o show_n to_o we_o although_o they_o do_v move_v if_o the_o sun_n be_v near_o we_o and_o gallop_v at_o that_o rate_n sure_o we_o can_v not_o distinguish_v between_o the_o beginning_n and_o end_v of_o his_o race_n but_o there_o will_v appear_v one_o permanent_a line_n of_o light_n from_o east_n to_o west_n without_o any_o motion_n at_o all_o as_o the_o torch_n seem_v to_o make_v with_o so_o much_o a_o slow_a motion_n one_o permanent_a immooveable_a wheel_n of_o fire_n but_o contrary_a to_o this_o effect_n we_o see_v that_o the_o sun_n and_o star_n by_o only_o be_v remove_v further_o from_o our_o eye_n do_v cousin_n our_o sight_n so_o gross_o that_o we_o can_v not_o discern_v they_o to_o be_v move_v at_o all_o one_o will_v imagine_v that_o so_o rapide_fw-la and_o swift_a a_o motion_n shall_v be_v perceive_v in_o some_o sort_n or_o other_o which_o whether_o it_o be_v in_o the_o earth_n or_o in_o they_o be_v all_o one_o to_o this_o purpose_n either_o we_o shall_v see_v they_o change_v their_o place_n while_o we_o look_v upon_o they_o as_o arrow_n and_o bird_n do_v when_o they_o fly_v in_o the_o air_n or_o else_o they_o shall_v make_v a_o stream_n of_o light_n big_a than_o themselves_o as_o the_o torch_n do_v but_o none_o of_o all_o this_o happen_v let_v we_o gaze_v upon_o they_o so_o long_o and_o so_o attentive_o that_o our_o eye_n be_v dazzle_v with_o look_v and_o all_o that_o while_o they_o seem_v to_o stand_v immooveable_a and_o our_o eye_n can_v give_v we_o no_o account_n of_o their_o journey_n till_o it_o be_v end_v they_o discern_v it_o not_o while_o it_o be_v in_o do_v so_o that_o if_o we_o consult_v with_o no_o better_a cownsailour_n than_o they_o we_o may_v wonder_v to_o see_v that_o body_n at_o night_n set_v in_o the_o west_n which_o in_o the_o morning_n we_o behold_v rise_v in_o the_o east_n but_o that_o which_o seem_v to_o be_v yet_o more_o strange_a be_v that_o these_o body_n move_v cross_v we_o and_o nevertheless_o be_v not_o perceive_v to_o have_v any_o motion_n at_o all_o consider_v then_o how_o much_o easy_o it_o be_v for_o a_o thing_n that_o move_v towards_o we_o to_o be_v with_o we_o before_o we_o be_v aware_a a_o nimble_a fencer_n will_v put_v in_o
shelter_n of_o a_o thick_a body_n do_v not_o hinder_v the_o descent_n of_o that_o which_o be_v under_o it_o pag._n 91._o §_o 6._o the_o reason_n why_o some_o body_n sink_v other_o swim_v pag._n 92._o §_o 7._o the_o five_o objection_n answer_v concern_v the_o descend_v of_o heavy_a body_n in_o stream_n pag._n 93._o §_o 8._o the_o six_o objection_n answer_v and_o that_o all_o heavy_a element_n do_v weigh_v in_o their_o own_o sphere_n pag._n 95._o §_o 9_o the_o seven_o objection_n answer_v and_o the_o reason_n why_o we_o do_v not_o feel_v the_o course_n of_o the_o air_n and_o atom_n that_o beat_v continual_o upon_o us._n ibidem_fw-la §_o 10._o how_o in_o the_o same_o body_n gravity_n may_v be_v great_a than_o density_n and_o density_n than_o gravity_n though_o they_o be_v the_o same_o thing_n pag._n 96._o §_o 11._o the_o opinion_n of_o gravity_n be_v a_o intrinsical_a inclination_n of_o a_o body_n to_o the_o centre_n refute_v by_o reason_n pag_n 97._o §_o 12._o the_o same_o opinion_n refute_v by_o several_a experience_n pag._n 98._o chap._n xii_o of_o violent_a motion_n pag._n 100_o §_o 1._o the_o state_n of_o the_o question_n touch_v the_o cause_n of_o violent_a motion_n ibid._n §_o 2._o that_o the_o medium_n be_v the_o only_a cause_n which_o continue_v violent_a motion_n ibidem_fw-la §_o 3._o a_o further_a explication_n of_o the_o former_a doctrine_n pag._n 101._o §_o 4._o that_o the_o air_n have_v strength_n enough_o to_o continue_v violent_a motion_n in_o a_o movable_a pag._n 102._o §_o 5._o a_o answer_n to_o the_o first_o objection_n that_o air_n be_v not_o apt_a to_o conserve_v motion_n and_o how_o violent_a motion_n come_v to_o cease_v pag_n 103._o §_o 6._o a_o answer_n to_o the_o second_o objection_n that_o the_o air_n have_v no_o power_n over_o heavy_a body_n pag._n 104._o §_o 7._o a_o answer_n to_o the_o three_o objection_n that_o a_o arrow_n shall_v fly_v fast_o broadwayes_o then_o long_a way_n pag._n 105._o chap._n xiii_o of_o three_o sort_n of_o violent_a motion_n reflection_n vndulation_n and_o refraction_n pag._n 106._o §_o 1._o that_o reflection_n be_v a_o kind_n of_o violent_a motion_n ibid._n §_o 2._o reflection_n be_v make_v at_o equal_a angle_n ibid._n §_o 3._o the_o cause_n and_o property_n of_o undulation_n pag._n 107._o §_o 4._o refraction_n at_o the_o entrance_n into_o the_o reflectent_a body_n be_v towards_o the_o perpendicular_a at_o the_o go_v out_o it_o be_v from_o it_o when_o the_o second_o superficies_n be_v parallel_n to_o the_o first_o pag._n 108._o §_o 5._o a_o refutation_n of_o mounseur_fw-fr des_fw-mi cartes_n his_o explication_n of_o refraction_n pag._n 109._o §_o 6._o a_o answer_n to_o the_o argument_n bring_v in_o favour_n of_o mounseur_fw-fr des_fw-mi cartes_n his_o opinion_n pag._n 111._o §_o 7._o the_o true_a cause_n of_o refraction_n of_o light_n both_o at_o its_o entrance_n and_o at_o its_o go_v out_o from_o the_o reflect_a body_n pag._n 112._o §_o 8._o a_o general_a rule_n to_o know_v the_o nature_n of_o reflection_n and_o refraction_n in_o all_o sort_n of_o surface_n pag._n 113._o §_o 9_o a_o body_n of_o great_a part_n and_o great_a pore_n make_v a_o great_a refraction_n than_o one_o of_o lesser_a part_n and_o lesser_a pore_n pag._n 114._o §_o 10._o a_o confirmation_n of_o the_o former_a doctrine_n out_o of_o the_o nature_n of_o body_n that_o refract_v light_a pag._n 115._o chap._n fourteen_o of_o the_o composition_n quality_n and_o generation_n of_o mix_a body_n pag._n 116._o §_o 1._o the_o connexion_n of_o this_o chapter_n with_o the_o rest_n and_o the_o author_n intent_n in_o it_o ibid._n §_o 2._o that_o there_o be_v a_o least_o cise_n of_o body_n and_o that_o this_o least_o cise_n be_v find_v in_o fire_n pag._n 117._o §_o 3._o the_o first_o conjunction_n of_o part_n be_v in_o body_n of_o least_o cise_n and_o it_o be_v make_v by_o the_o force_n of_o quantity_n ibid._n §_o 4._o the_o second_o sort_n of_o conjunction_n be_v compactednesse_n in_o simple_a element_n and_o it_o procee_v from_o density_n pag._n 118._o §_o 5._o the_o three_o conjunction_n be_v of_o parre_v of_o different_a element_n and_o it_o proceed_v from_o quantity_n and_o density_n together_o ibid._n §_o 6._o the_o reason_n why_o liquid_a body_n do_v easy_o join_v together_o and_o dry_a one_o difficult_o pag._n 119._o §_o 7._o that_o no_o two_o hard_a body_n can_v touch_v one_o a_o other_o immediate_o ibid._n §_o 8._o how_o mix_v body_n be_v frame_v in_o general_n pag._n 121._o §_o 9_o the_o cause_n of_o the_o several_a degree_n of_o solidity_n in_o mix_a body_n ibid._n §_o 10._o the_o rule_n where_o unto_o be_v reduce_v all_o the_o several_a combination_n of_o element_n in_o compound_v of_o mix_a body_n pag._n 122._o §_o 11._o earth_n and_o water_n be_v the_o basis_n of_o all_o permanent_a mix_a body_n pag._n 123._o §_o 12._o what_o kind_n of_o body_n those_o be_v where_o water_n be_v the_o basis_n and_o earth_n the_o predominant_a element_n over_o the_o other_o two_o ibid._n §_o 13._o of_o those_o body_n where_o water_n be_v the_o basis_n air_n be_v the_o predominant_a element_n ibid._n §_o 14._o what_o kind_n of_o body_n result_v where_o water_n be_v the_o basis_n and_o fire_n the_o predominant_a element_n pag._n 124._o §_o 15._o of_o those_o body_n where_o water_n be_v in_o excess_n it_o alone_o be_v both_o the_o basis_n and_o the_o predominant_a element_n pag._n 125._o §_o 16._o of_o those_o body_n where_o earth_n alone_o be_v the_o basis_n and_o also_o the_o predominant_a in_o excess_n over_o the_o other_o three_o element_n ibid._n §_o 17._o of_o those_o body_n where_o earth_n be_v the_o basis_n and_o water_v the_o predominant_a element_n over_o the_o other_o two_o ibid._n §_o 18._o of_o those_o body_n where_o earth_n be_v the_o basis_n air_n be_v the_o predominant_a ibid._n §_o 19_o of_o those_o body_n where_o earth_n be_v the_o basis_n fire_n be_v the_o predominant_a pag._n 126._o §_o 20._o all_o the_o second_o quality_n of_o mix_a body_n arise_v from_o several_a combination_n of_o the_o first_o quality_n and_o be_v at_o last_o resolve_v into_o several_a degree_n of_o rarity_n and_o density_n ibid._n §_o 21._o that_o in_o the_o planet_n and_o star_n there_o be_v a_o like_a variety_n of_o mix_a body_n cause_n by_o light_a as_o here_o upon_o earth_n pag._n 127._o §_o 22._o in_o what_o manner_n the_o element_n do_v work_v upon_o one_o a_o other_o in_o the_o composition_n of_o mix_a body_n and_o in_o particular_a fire_n which_o be_v the_o most_o active_a ibid._n §_o 23._o a_o particular_a declaration_n touch_v the_o generation_n of_o metal_n pag._n 128._o chap._n xv._n of_o the_o dissolution_n of_o mix_a body_n pag._n 130._o §_o 1._o why_o some_o body_n be_v brittle_a and_o other_o tough_a or_o apt_a to_o withstand_v outward_a violence_n the_o first_o instrument_n to_o dissolve_v mix_v body_n ibid._n §_o 2._o how_o outward_a violence_n do_v work_v upon_o the_o most_o compact_a body_n pag._n 131._o §_o 3._o the_o several_a effect_n of_o fire_n the_o second_o and_o chief_a instrument_n to_o dissolve_v all_o compound_a body_n ibid._n §_o 4._o the_o reason_n why_o some_o body_n be_v not_o dissolve_v by_o fire_n pag._n 132._o §_o 5._o the_o reason_n why_o fire_n melt_v gold_n but_o can_v not_o consume_v it_o ibid._n §_o 6._o why_o lead_n be_v easy_o consume_v and_o calcine_v by_o fire_n pag._n 133._o §_o 7._o why_o and_o how_o some_o body_n be_v divide_v by_o fire_n into_o spirit_n water_n oil_n salte_n and_o earth_n and_o what_o those_o part_n be_v ibid._n §_o 8._o how_o water_n the_o three_o instrument_n to_o dissolve_v body_n dissolve_v calx_fw-la into_o salt_n and_o so_o into_o terra_fw-la damnata_fw-la pag._n 135._o §_o 9_o how_o water_n mingle_v with_o salt_n become_v a_o most_o powerful_a agent_n to_o dissolve_v other_o body_n pag._n 136._o §_o 10._o how_o putrefaction_n be_v cause_v ibid._n chap._n xvi_o a_o explication_n of_o certain_a maxim_n touch_v the_o operation_n and_o quality_n of_o body_n and_o whether_o the_o element_n be_v find_v pure_a in_o any_o part_n of_o the_o world_n pag._n 137._o §_o 1._o what_o be_v the_o sphere_n of_o activity_n in_o corporeal_a agent_n ibid._n §_o 2._o the_o reason_n why_o no_o body_n can_v work_v in_o distance_n pag._n 138._o §_o 3._o a_o objection_n answer_v against_o the_o manner_n of_o explicate_v the_o former_a axiom_n pag._n 139_o §_o 4._o of_o reaction_n and_o first_o in_o pure_a local_a motion_n that_o each_o agent_n must_v suffer_v in_o act_v and_o act_n in_o suffering_n ibid._n §_o 5._o the_o former_a doctrine_n apply_v to_o other_o local_a motion_n design_v by_o particular_a name_n and_o that_o suisseths_n argument_n be_v of_o no_o force_n against_o this_o way_n of_o doctrine_n pag._n 141._o §_o 6._o why_o some_o notion_n do_v admit_v
in_o the_o denomination_n and_o that_o thereby_o the_o same_o body_n may_v be_v conceive_v to_o be_v more_o or_o less_o impartible_a than_o it_o be_v active_a or_o heavy_a as_o for_o example_n let_v we_o of_o a_o dense_a element_n take_v any_o one_o lest_o part_n which_o must_v of_o necessity_n be_v in_o its_o own_o nature_n and_o kind_n absolute_o impartible_a and_o yet_o it_o be_v evident_a that_o the_o gravity_n of_o this_o part_n must_v be_v exceed_o little_a by_o reason_n of_o the_o litlenesse_n of_o its_o quantity_n so_o that_o thus_o you_o see_v a_o extremity_n of_o the_o effect_n of_o density_n join_v together_o in_o one_o body_n by_o the_o accident_n of_o the_o litlenesse_n of_o it_o with_o a_o contrary_a extremity_n of_o the_o effect_n of_o gravity_n or_o rather_o with_o the_o want_n of_o it_o each_o of_o they_o within_o the_o limit_n of_o the_o same_o species_n in_o like_a manner_n it_o happen_v that_o the_o same_o body_n in_o one_o circumstance_n be_v more_o weighty_a in_o a_o other_o or_o rather_o in_o the_o contrary_a be_v more_o partible_a so_o water_n when_o it_o be_v in_o a_o pail_n because_o it_o be_v thereby_o hinder_v from_o spread_v abroad_o have_v the_o effect_n of_o gravity_n predominate_v in_o it_o but_o if_o it_o be_v pour_v out_o it_o have_v the_o effect_n of_o partibility_n more_o and_o thus_o it_o happen_v that_o mere_o by_o the_o gradation_n of_o rarity_n and_o density_n one_o dense_a body_n may_v be_v apt_a out_o of_o the_o general_a course_n of_o natural_a cause_n to_o be_v more_o divisible_a they_o to_o be_v a_o divider_n though_o according_a to_o the_o nature_n of_o the_o degree_n consider_v absolute_o in_o themselves_o what_o be_v more_o powerful_a to_o divide_v be_v also_o more_o resistent_fw-la and_o hard_a to_o be_v divide_v and_o this_o arrive_v in_o that_o degree_n which_o make_v water_n for_o the_o fall_n and_o beat_v of_o the_o atom_n upon_o water_n have_v the_o power_n both_o to_o divide_v it_o and_o to_o makâ—_n it_o descend_v but_o so_o that_o by_o make_v it_o descend_v it_o divide_v it_o and_o therefore_o we_o say_v that_o it_o have_v more_o grautty_a than_o density_n though_o it_o be_v the_o very_a density_n of_o it_o which_o be_v the_o cause_n that_o make_v it_o partible_a by_o the_o work_n of_o one_o part_n upon_o a_o other_o for_o if_o the_o atom_n do_v not_o find_v the_o body_n so_o dense_a as_o it_o be_v they_o can_v not_o by_o their_o beat_n upon_o one_o part_n make_v a_o other_o be_v divide_v so_o that_o a_o dense_a body_n to_o be_v more_o heavy_a than_o dense_a signify_v nothing_o else_o but_o that_o it_o be_v in_o such_o a_o degree_n of_o density_n â—hat_n some_o of_o its_o own_o part_n by_o their_o be_v assist_v and_o set_v on_o work_n by_o a_o general_a cause_n which_o be_v the_o fall_n of_o the_o atom_n be_v powerful_a enough_o to_o divide_v other_o adjoin_v part_n of_o the_o same_o density_n with_o they_o one_o from_o a_o other_o in_o such_o sort_n as_o we_o see_v that_o water_n pour_v out_o of_o a_o eawer_n into_o a_o basin_n where_o there_o be_v already_o other_o water_n have_v the_o power_n to_o divide_v the_o water_n in_o the_o basin_n by_o the_o assistance_n of_o the_o celerity_n which_o it_o get_v in_o descend_v and_o now_o i_o hope_v the_o reader_n be_v full_o satisfy_v that_o there_o be_v no_o contradiction_n in_o put_v density_n and_o gravity_n to_o be_v the_o same_o thing_n material_o and_o that_o nevertheless_o the_o same_o thing_n may_v be_v more_o heavy_a than_o dense_a or_o more_o dense_a than_o heavy_a as_o we_o take_v it_o to_o our_o several_a purpose_n in_o the_o investigation_n of_o the_o element_n reason_n have_v thus_o lay_v a_o intelligible_a ground_n to_o discover_v how_o these_o motion_n that_o be_v general_a to_o all_o body_n and_o be_v natural_a in_o chief_a be_v contrive_v by_o nature_n we_o will_v now_o endeavour_v to_o show_v that_o the_o contrary_a position_n be_v not_o only_o voluntary_a but_o also_o impossible_a let_v we_o therefore_o suppose_v that_o a_o body_n have_v a_o quality_n to_o move_v it_o downwards_o and_o first_o we_o shall_v ask_v what_o downwards_o signify_v for_o either_o it_o signify_v towards_o a_o fix_a point_n of_o imaginary_a space_n or_o towards_o a_o fix_a point_n of_o the_o universe_n or_o towards_o some_o mooveable_a point_n as_o for_o the_o first_o who_o will_v maintain_v it_o must_v have_v more_o imagination_n than_o judgement_n to_o think_v that_o a_o natural_a quality_n can_v have_v a_o essence_n determine_v by_o a_o nothing_o because_o we_o can_v frame_v a_o conceit_n of_o that_o nothing_o as_o for_o the_o second_o it_o be_v very_o uncertain_a whether_o any_o such_o point_n be_v in_o nature_n for_o as_o for_o the_o centre_n of_o the_o earth_n it_o be_v clear_a that_o if_o the_o earth_n be_v carry_v about_o the_o centre_n of_o it_o can_v not_o be_v a_o fix_a point_n again_o if_o the_o centre_n signify_v a_o determinate_a point_n in_o the_o earth_n that_o be_v the_o medium_n of_o gravity_n or_o of_o quantity_n it_o be_v change_v as_o often_o as_o any_o dust_n light_v unequal_o upon_o any_o one_o side_n of_o the_o earth_n which_o will_v make_v that_o side_n big_a than_o it_o be_v and_o i_o doubt_v a_o quality_n can_v not_o have_v moral_a consideration_n to_o think_v that_o so_o little_a do_v no_o harm_n as_o for_o the_o three_o position_n likewise_o it_o be_v not_o intelligible_a how_o a_o quality_n shall_v change_v its_o inclination_n or_o essence_n according_a to_o the_o change_n that_o shall_v light_v to_o make_v now_o one_o point_n now_o a_o other_o be_v the_o centre_n unto_o which_o it_o shall_v tend_v again_o let_v we_o consider_v that_o a_o quality_n have_v a_o determinate_a essence_n then_o see_v its_o power_n be_v to_o move_v and_o to_o move_v signify_v to_o cut_v the_o medium_n it_o be_v move_v in_o it_o belong_v unto_o it_o of_o its_o nature_n to_o cut_v so_o much_o of_o such_o a_o medium_n in_o such_o a_o time_n so_o that_o if_o no_o other_o cause_n be_v add_v but_o that_o you_o take_v precise_o and_o in_o abstracto_fw-la that_o quality_n that_o medium_n and_o that_o time_n this_o effect_n will_v follow_v that_o so_o much_o motion_n be_v make_v and_o if_o this_o effect_n shall_v not_o follow_v it_o be_v clear_a that_o the_o be_v able_a to_o cut_v so_o much_o of_o such_o a_o medium_n in_o such_o a_o time_n be_v not_o the_o essence_n of_o this_o quality_n as_o it_o be_v suppose_v to_o be_v divide_v then_o the_o time_n and_o the_o medium_n half_o the_o motion_n shall_v the_o make_v in_o half_a the_o time_n a_o quarter_n of_o the_o motion_n in_o a_o quarter_n of_o the_o time_n and_o so_o without_o end_n as_o far_o as_o you_o can_v divide_v but_o this_o be_v demonstrative_o impossible_a sithhence_o it_o be_v demonstrate_v that_o a_o mooveable_a come_n from_o rest_n must_v of_o necessity_n pass_v through_o all_o degree_n of_o tardity_n and_o therefore_o by_o the_o demonstration_n cite_v out_o of_o galileus_n we_o may_v take_v a_o part_n in_o which_o this_o gravity_n can_v not_o move_v its_o body_n in_o a_o proportionate_a part_n of_o time_n through_o a_o proportionate_a part_n of_o the_o medium_n experience_n but_o because_o in_o natural_a theorem_n experience_n be_v natural_o require_v let_v we_o see_v whether_o nature_n give_v we_o any_o testimony_n of_o this_o verity_n to_o that_o purpose_n we_o may_v consider_v a_o plummet_n hang_v in_o a_o small_a string_n from_o a_o beam_n which_o be_v lift_v up_o gentle_o on_o the_o one_o side_n at_o the_o extent_n of_o the_o string_n and_o permit_v to_o fall_v mere_o by_o the_o power_n of_o gravity_n it_o will_v ascend_v very_o near_o as_o high_a on_o the_o contrary_a side_n as_o the_o place_n it_o be_v hold_v in_o from_o whence_o it_o fall_v in_o this_o experiment_n we_o may_v note_v two_o thing_n the_o first_o that_o if_o gravity_n be_v a_o quality_n it_o work_v against_o its_o own_o nature_n in_o lift_v up_o the_o plumett_n see_v its_o nature_n be_v only_o to_o carry_v it_o down_o for_o though_o it_o may_v be_v answer_v that_o it_o be_v not_o the_o gravity_n but_o a_o other_o quality_n call_v vis_fw-la impressa_fw-la which_o carry_v it_o up_o nevertheless_o it_o can_v not_o be_v deny_v but_o that_o gravity_n be_v either_o the_o immediate_a or_o at_o least_o the_o mediate_a cause_n which_o make_v this_o vis_fw-la impressa_fw-la the_o effect_n whereof_o be_v contrary_a to_o the_o nature_n of_o gravity_n it_o be_v absurd_a to_o make_v gravity_n the_o cause_n of_o it_o that_o be_v the_o cause_n of_o a_o essence_n who_o nature_n be_v contrary_a to_o its_o own_o and_o the_o same_o argument_n will_v proceed_v though_o you_o put_v not_o vis_fw-la impressa_fw-la but_o suppose_v some_o other_o thing_n to_o be_v
can_v not_o doubt_v but_o that_o this_o flood_n of_o atom_n stream_v from_o the_o pole_n of_o the_o earth_n must_v needs_o pass_v through_o that_o stone_n with_o more_o speed_n and_o vigour_n than_o they_o can_v do_v any_o other_o way_n and_o as_o we_o see_v in_o the_o run_n of_o water_n that_o if_o it_o meet_v with_o any_o low_a cranny_n than_o the_o wide_a channel_n it_o stream_v in_o it_o will_v turn_v out_o of_o its_o straight_a way_n to_o glide_v along_o there_o where_o it_o find_v a_o easy_a and_o more_o declive_a bed_n to_o tumble_v in_o so_o these_o atom_n will_v infallible_o deturne_v themselves_o from_o their_o direct_a course_n to_o pass_v through_o such_o a_o stone_n as_o far_o as_o their_o great_a conveniency_n lead_v they_o and_o what_o we_o have_v say_v of_o these_o atom_n which_o from_o the_o pole_n do_v range_v through_o the_o vast_a sea_n of_o air_n to_o the_o aequator_fw-la be_v likewise_o to_o be_v apply_v unto_o those_o atom_n which_o issue_n out_o of_o the_o stone_n so_o that_o we_o may_v conclude_v that_o if_o they_o meet_v with_o any_o help_n which_o may_v convey_v they_o on_o with_o more_o speed_n and_o vigour_n then_o while_o they_o stream_n direct_o forwards_o they_o will_v likewise_o deturne_v themselves_o from_o direct_o forwards_o to_o take_v that_o course_n and_o if_o the_o stone_n itself_o be_v hang_v so_o nice_o that_o a_o less_o force_n be_v able_a to_o turn_v it_o about_o then_o be_v requisite_a to_o turn_v awâ—y_o out_o of_o its_o course_n the_o continue_a stream_n of_o atom_n which_o issue_v from_o the_o stone_n in_o this_o case_n the_o stone_n itself_o must_v needs_o turn_v towards_o that_o stream_n which_o climb_v and_o filter_v itself_o along_o the_o stone_n stream_n draw_v it_o out_o of_o its_o course_n in_o such_o sort_n as_o the_o nose_n of_o a_o weathercock_n but_v itself_o into_o the_o wind_n now_o then_o it_o be_v know_v that_o the_o strong_a stream_n come_v direct_o from_o the_o north_n in_o the_o great_a earth_n and_o that_o the_o souththerne_a stream_n of_o the_o terrella_n or_o loadestone_n proportion_v due_o by_o nature_n to_o incorporate_v with_o the_o north_n stream_n of_o the_o earth_n issue_v out_o of_o the_o north_n end_n of_o the_o stone_n it_o follow_v plain_o that_o when_o a_o loadestone_n be_v situate_v at_o liberty_n its_o north_n end_n must_v necessary_o turn_v towards_o the_o north_n pole_n of_o the_o world_n and_o it_o will_v likewise_o follow_v that_o whensoever_o such_o a_o stone_n meet_v with_o a_o other_o of_o the_o same_o nature_n and_o kind_n they_o must_v comport_v themselves_o to_o one_o a_o other_o in_o like_a sort_n that_o be_v if_o both_o of_o they_o be_v free_a and_o equal_a they_o must_v turn_v themselves_o to_o or_o from_o one_o a_o other_o according_a as_o they_o be_v situate_v in_o respect_n of_o one_o a_o other_o so_o that_o if_o their_o axe_n be_v parallel_n and_o the_o south_n pole_n of_o the_o one_o and_o the_o north_n of_o the_o other_o do_v look_v the_o same_o way_n then_o they_o will_v send_v proportionate_a and_o agree_v stream_n to_o one_o a_o other_o from_o their_o whole_a body_n that_o will_v ready_o mingle_v and_o incorporate_v with_o one_o a_o other_o without_o turn_v out_o of_o their_o way_n or_o seek_v any_o short_a course_n or_o change_v their_o respect_n to_o one_o another_o but_o if_o the_o pole_n of_o the_o same_o denomination_n do_v look_v the_o same_o way_n and_o the_o loadestone_n do_v not_o lie_v in_o such_o sort_n as_o to_o have_v their_o axe_n parallel_n but_o that_o they_o incline_v to_o one_o a_o other_o then_o they_o will_v work_v themselves_o about_o until_o they_o grow_v by_o their_o opposite_a pole_n into_o a_o straight_a line_n for_o the_o same_o reason_n as_o we_o have_v show_v of_o a_o loadestone_n turn_v to_o the_o pole_n of_o the_o earth_n but_o if_o only_a one_o of_o the_o loadestone_n be_v free_a and_o the_o other_o be_v fix_v and_o that_o they_o lie_v incline_v as_o in_o the_o former_a case_n then_o the_o free_a stone_n will_v work_v himself_o until_o his_o pole_n be_v opposite_a to_o that_o part_n of_o the_o fix_a stone_n from_o whence_o the_o stream_n which_o agree_v with_o he_o issue_v strong_a for_o that_o stream_n be_v to_o the_o free_a loadestone_n as_o the_o northern_a stream_n of_o the_o earth_n be_v to_o a_o loadestone_n compare_v unto_o the_o earth_n but_o withal_o we_o must_v take_v notice_n that_o in_o this_o our_o discourse_n we_o abstract_a from_o other_o accident_n and_o particular_o from_o the_o influence_n of_o the_o earth_n stream_n into_o the_o loadestone_n which_o will_v cause_v great_a variety_n in_o these_o case_n if_o they_o lie_v not_o due_a north_n and_o south_n when_o they_o begin_v to_o work_v and_o as_o loadestone_n and_o other_o magnetike_a body_n do_v thus_o of_o necessity_n turn_v to_o one_o a_o other_o when_o they_o be_v both_o free_a and_o if_o one_o of_o they_o be_v fasten_v the_o other_o turn_v to_o it_o so_o likewise_o if_o they_o be_v free_a to_o progressive_a motion_n they_o must_v by_o a_o like_a necessity_n and_o for_o the_o same_o reason_n come_v together_o and_o join_v themselves_o to_o one_o a_o other_o and_o if_o only_o one_o of_o they_o be_v free_a that_o must_v remove_v itself_o to_o the_o other_o for_o the_o same_o virtue_n that_o make_v they_o turn_v which_o be_v the_o strength_n of_o the_o steam_n will_v likewise_o in_o due_a circumstance_n make_v they_o come_v together_o by_o reason_n that_o the_o steame_n which_o climb_v up_o one_o a_o other_o by_o the_o way_n of_o filtration_n and_o do_v thereby_o turn_v the_o body_n of_o the_o stone_n upon_o their_o centre_n when_o they_o be_v only_o free_a to_o turn_v must_v likewise_o draw_v the_o whole_a body_n of_o the_o stone_n entire_o out_o of_o their_o place_n and_o make_v they_o join_v when_o such_o a_o total_a motion_n of_o the_o body_n be_v a_o effect_n that_o require_v no_o more_o force_n than_o the_o force_n of_o convey_v vigorous_o the_o stream_n of_o both_o the_o magnetike_a body_n into_o one_o a_o other_o that_o be_v when_o there_o be_v no_o such_o impediment_n stand_v in_o the_o way_n of_o the_o magnetike_a body_n motion_n but_o that_o the_o celerity_n of_o the_o atom_n motion_n mingle_v with_o one_o a_o other_o be_v able_a to_o overcome_v it_o for_o then_o it_o must_v needs_o do_v so_o and_o the_o magnetike_a body_n by_o natural_a coherence_n unto_o the_o steam_n of_o atom_n in_o which_o it_o be_v involue_v follow_v the_o course_n of_o the_o steam_n in_o such_o sort_n as_o in_o the_o example_n we_o have_v heretofore_o upon_o a_o other_o occasion_n give_v of_o a_o eggshell_n fill_v with_o dew_n the_o sunnebeame_n convert_n the_o dew_n into_o smoke_n and_o raise_v up_o that_o smoke_n or_o steam_n the_o eggshell_n be_v likewise_o raise_v up_o for_o company_n with_o the_o steam_n that_o issue_v from_o it_o and_o for_o the_o same_o reason_n it_o be_v that_o the_o loadestone_n draw_v iron_n for_o iron_n be_v of_o a_o nature_n apt_a to_o 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