show_v we_o that_o the_o less_o the_o atom_n shall_v penetrate_v into_o a_o move_a body_n by_o reason_n of_o the_o extreme_a density_n of_o it_o the_o more_o efficacious_o they_o will_v work_v and_o the_o great_a celerity_n they_o will_v cause_v in_o its_o motion_n and_o hence_o we_o may_v give_v the_o full_a solution_n to_o the_o objection_n above_o which_o be_v to_o this_o effect_n that_o see_v division_n be_v make_v only_o by_o the_o superficies_n or_o exterior_a part_n of_o the_o dense_a body_n and_o that_o the_o virtue_n whereby_o a_o dense_a body_n do_v work_v be_v only_o its_o resistance_n to_o division_n which_o make_v it_o apt_a to_o divide_v it_o will_v follow_v that_o a_o hollow_a bowl_n of_o brass_n or_o iron_n shall_v be_v as_o heavy_a as_o a_o solid_a one_o for_o we_o may_v answer_v that_o see_v the_o atom_n must_v strike_v through_o the_o body_n and_o that_o a_o cessible_a body_n do_v not_o receive_v their_o stroke_n so_o firm_o as_o a_o stiff_a one_o nor_o can_v convey_v they_o so_o far_o if_o unto_o a_o stiff_a superficies_n there_o succeed_v a_o yield_a inside_n the_o stroke_n must_v of_o necessity_n loose_a much_o of_o their_o force_n and_o consequent_o can_v not_o move_v a_o body_n full_a of_o air_n with_o so_o much_o celerity_n or_o with_o so_o much_o efficacy_n as_o they_o may_v a_o solid_a one_o body_n but_o then_o you_o may_v peradventure_o say_v that_o if_o these_o stroke_n of_o the_o descend_a atom_n upon_o a_o dense_a body_n be_v the_o cause_n of_o its_o motion_n downwards_o we_o must_v allow_v the_o atom_n to_o move_v fast_o than_o the_o dense_a body_n that_o so_o they_o may_v still_o overtake_v it_o and_o drive_v it_o along_o and_o enter_v into_o it_o whereas_o if_o they_o shall_v move_v slow_a than_o it_o none_o of_o they_o can_v come_v in_o their_o turn_n to_o give_v it_o a_o stroke_n but_o it_o will_v be_v pass_v they_o and_o out_o of_o their_o reach_n before_o they_o can_v strike_v it_o but_o it_o be_v evident_a say_v you_o out_o of_o these_o pretend_a cause_n of_o this_o motion_n that_o such_o atom_n can_v not_o move_v so_o swift_o downwards_o as_o a_o great_a dense_a body_n since_o their_o litlenesse_n and_o their_o rarity_n be_v both_o of_o they_o hinder_v to_o their_o motion_n and_o therefore_o this_o can_v not_o be_v the_o cause_n of_o that_o effect_n which_o we_o call_v gravity_n to_o this_o i_o reply_v that_o to_o have_v the_o atom_n give_v these_o blow_n to_o a_o descend_v dense_a body_n do_v not_o require_v that_o their_o natural_a and_o ordinary_a motion_n shall_v be_v swift_a than_o the_o descent_n of_o such_o a_o dense_a body_n but_o the_o very_a descent_n of_o it_o occasion_v their_o strike_v it_o for_o as_o it_o fall_v and_o make_v itself_o a_o way_n through_o they_o they_o divide_v themselves_o before_o it_o and_o swell_v on_o the_o side_n and_o a_o little_a above_o it_o and_o present_o close_v again_o behind_o it_o and_o over_o it_o as_o soon_o as_o it_o be_v past_a now_o that_o close_n to_o hinder_v vacuity_n of_o space_n be_v a_o sudden_a one_o and_o thereby_o attain_v great_a velocity_n which_o will_v carry_v the_o atom_n in_o that_o degree_n of_o velocity_n further_o than_o the_o descend_a body_n if_o they_o do_v not_o encounter_v with_o it_o in_o their_o way_n to_o retarde_n they_o which_o encounter_n and_o retard_v imply_v such_o stroke_n upon_o the_o dense_a body_n as_o we_o suppose_v to_o cause_v this_o motion_n and_o the_o like_a we_o see_v in_o water_n into_o which_o let_v a_o stone_n fall_v present_o the_o water_n that_o be_v divide_v by_o the_o stone_n and_o swell_v on_o the_o side_n high_o than_o it_o be_v before_o close_v upon_o the_o back_n of_o the_o descend_a stone_n and_o follow_v it_o so_o violent_o that_o for_o a_o while_n after_o it_o leave_v a_o purl_a hole_n in_o the_o place_n where_o the_o stone_n go_v down_o till_o by_o the_o repose_n of_o the_o stone_n the_o water_n return_v likewise_o to_o its_o quiet_a and_o so_o its_o superficies_n become_v even_o in_o the_o three_o place_n a_o enquiry_n occur_v emergent_a out_o of_o this_o doctrine_n of_o the_o cause_n of_o body_n move_v upwardes_o and_o downwards_o undecided_a which_o be_v whether_o there_o will_v be_v any_o natural_a motion_n deep_a in_o the_o earth_n beyond_o the_o activity_n of_o the_o sun_n beam_n for_o out_o of_o these_o principle_n it_o follow_v that_o there_o will_v not_o and_o consequent_o there_o must_v be_v a_o vast_a orb_n in_o which_o there_o will_v be_v no_o motion_n of_o gravity_n or_o of_o levity_n for_o suppose_v that_o the_o sun_n beam_n may_v pierce_v a_o thousand_o mile_n deep_a into_o the_o body_n of_o the_o earth_n yet_o there_o will_v still_o remain_v a_o mass_n who_o diameter_n will_v be_v near_o 5000_o mile_n in_o which_o there_o will_v be_v no_o gravitation_n nor_o the_o contrary_a motion_n for_o my_o part_n i_o shall_v make_v no_o difficulty_n to_o grant_v the_o inference_n as_o far_o as_o concern_v motion_n cause_v by_o our_o sun_n for_o what_o inconvenience_n will_v follow_v out_o of_o it_o but_o i_o will_v not_o offer_v at_o determine_v whether_o there_o may_v not_o be_v enclose_v within_o that_o great_a sphere_n of_o earth_n some_o other_o fire_n such_o as_o the_o chymiste_n talk_v of_o a_o archaeus_n a_o demogorgon_n seat_v in_o the_o centre_n like_o the_o hart_n in_o animal_n which_o may_v raise_v up_o vapour_n and_o boil_v a_o air_n out_o of_o they_o and_o divide_v gross_a body_n into_o atom_n and_o according_o give_v they_o motion_n answerable_a to_o we_o but_o in_o different_a line_n from_o we_o according_a as_o that_o fire_n or_o sun_n be_v situate_v since_o the_o farre-searching_a author_n of_o the_o dialogue_n de_fw-fr mundo_fw-la have_v leave_v that_o speculation_n undecided_a after_o he_o have_v touch_v upon_o it_o in_o the_o 12_o knot_n of_o his_o first_o dialogue_n four_o it_o it_o may_v be_v object_v that_o if_o such_o descend_a atom_n as_o we_o have_v describe_v be_v the_o cause_n of_o a_o body_n gravity_n and_o descend_v towards_o the_o centre_n the_o same_o body_n will_v at_o diverse_a time_n descend_v more_o and_o less_o swift_o for_o example_n after_o midnight_n when_o the_o atom_n begin_v to_o descend_v more_o slow_o then_o likewise_o the_o same_o body_n will_v descend_v more_o slow_o in_o a_o like_a proportion_n and_o not_o weigh_v so_o much_o as_o it_o do_v in_o the_o heat_n of_o the_o day_n the_o same_o may_v be_v say_v of_o summer_n and_o winter_n for_o in_o winter_n time_n the_o atom_n seem_v to_o be_v more_o gross_a and_o consequent_o to_o strike_v more_o strong_o upon_o the_o body_n they_o meet_v with_o in_o their_o way_n as_o they_o descend_v yet_o on_o the_o other_o side_n they_o seem_v in_o the_o summer_n to_o be_v more_o numerous_a as_o also_o to_o descend_v from_o a_o great_a height_n both_o which_o circumstance_n will_v be_v cause_n of_o a_o strong_a stroke_n and_o more_o vigorous_a impulse_n upon_o the_o body_n they_o hit_v and_o the_o like_a may_v be_v object_v of_o diverse_a part_n of_o the_o world_n for_o in_o the_o torride_a zone_n it_o will_v always_o happen_v as_o in_o summer_n in_o place_n of_o the_o temperate_a zone_n and_o in_o the_o polar_n climb_v as_o in_o deep_a winter_n so_o that_o no_o where_o there_o will_v be_v any_o standard_n or_o certainty_n in_o the_o weight_n of_o body_n if_o it_o depend_v upon_o so_o mutable_a a_o cause_n and_o it_o make_v to_o the_o same_o effect_n that_o a_o body_n which_o lie_v under_o a_o thick_a rock_n or_o any_o other_o very_o dense_a body_n that_o can_v not_o be_v penetrate_v by_o any_o great_a store_n of_o atom_n shall_v not_o be_v so_o heavy_a as_o it_o will_v be_v in_o the_o open_a and_o free_a air_n where_o the_o atom_n in_o their_o complete_a number_n have_v their_o full_a stroke_n for_o answer_v to_o these_o and_o such_o like_a instance_n we_o be_v to_o note_v first_o that_o it_o be_v not_o so_o much_o the_o number_n or_o the_o violence_n of_o the_o percussion_n of_o the_o strike_a atom_n as_o the_o density_n of_o the_o thing_n strike_v which_o give_v the_o measure_n to_o the_o descend_v of_o a_o weighty_a body_n and_o the_o chief_a thing_n which_o the_o stroke_n of_o the_o atom_n give_v unto_o a_o dense_a body_n be_v a_o determination_n of_o the_o way_n which_o a_o dense_a body_n be_v to_o cut_v unto_o itself_o therefore_o multiplication_n or_o lessen_v of_o the_o atom_n will_v not_o make_v any_o sensible_a difference_n betwixt_o the_o weight_n of_o one_o dense_a body_n where_o many_o atom_n do_v strike_v and_o a_o other_o body_n of_o the_o same_o density_n where_o but_o few_o do_v strike_v so_o that_o the_o stroke_n downwards_o of_o the_o descend_a atom_n be_v great_a than_o the_o stroke_n upwardes_o
ibid._n §_o 2._o what_o place_n be_v both_o notional_o and_o real_o pag._n 33._o §_o 3._o local_a motion_n be_v that_o division_n whereby_o a_o body_n chane_v its_o place_n pag._n 34._o §_o 4._o the_o nature_n of_o quantity_n of_o itself_o be_v sufficient_a to_o unite_v a_o body_n to_o its_o place_n ibidem_fw-la §_o 5._o all_o operation_n among_o body_n be_v either_o local_a motion_n or_o such_o as_o follow_v out_o of_o local_a motion_n pag._n 35._o §_o 6._o earth_n compare_v to_o water_n in_o activity_n pag._n 36._o §_o 7._o the_o manner_n whereby_o fire_n get_v in_o fuel_n prove_v that_o it_o exceed_v earth_n in_o activity_n ibid._n §_o 8._o the_o same_o be_v prove_v by_o the_o manner_n whereby_o fire_n come_v ut_fw-la of_o fuel_n and_o work_v upon_o other_o body_n pag._n 37._o chap._n vi_o of_o light_n what_o it_o be_v pag._n 39_o §_o 1._o in_o what_o sense_n the_o author_n reject_v quality_n ibid._n §_o 2._o in_o what_o sense_n the_o author_n do_v admit_v of_o quality_n pag._n 40._o §_o 3._o five_o argument_n propose_v to_o prove_v that_o light_n be_v not_o a_o body_n pag._n 41._o §_o 4._o the_o two_o first_o reason_n to_o prove_v light_a to_o be_v a_o body_n be_v the_o resemblance_n it_o have_v with_o fire_n and_o because_o if_o it_o be_v a_o quality_n it_o will_v always_o produce_v a_o equal_a to_o itself_o pag._n 42._o §_o 5._o the_o three_o reason_n because_o if_o we_o imagine_v to_o ourselves_o the_o substance_n of_o fire_n to_o be_v rarify_v it_o will_v have_v the_o same_o appearence_n which_o light_n have_v pag._n 43._o §_o 6._o the_o four_o reason_n from_o the_o manner_n of_o the_o genertion_n and_o corruption_n of_o light_n which_o agree_v with_o fire_n ibid._n §_o 7._o the_o five_o reason_n because_o such_o propery_n belong_v to_o light_a as_o agree_v only_o unto_o body_n pag._n 45._o chap._n vii_o two_o objection_n answer_v against_o light_n be_v fire_n a_o more_o ample_a proof_n of_o its_o be_v such_o ibid._n §_o 1._o that_o all_o light_n be_v hot_a and_o apt_a o_o heat_n ibid._n §_o 2._o the_o reason_n why_o our_o body_n for_o the_o most_o part_n do_v not_o feel_v the_o heat_n of_o pure_a light_n pag._n 46._o §_o 3._o the_o experience_n of_o burningglass_n and_o of_o sultry_a gloomy_a weather_n prove_v light_a to_o be_v fire_n pag._n 48._o §_o 4._o philosopher_n ought_v not_o to_o be_v judge_n ot_fw-mi thing_n by_o the_o rule_n of_o vulgar_a people_n ibidem_fw-la §_o 5._o the_o different_a name_n of_o light_n and_o fire_n proceed_v from_o different_a notion_n of_o the_o same_o substance_n pag._n 49._o §_o 6._o the_o reason_n why_o many_o time_n fire_n and_o heat_n be_v deprive_v of_o light_n pag._n 50._o §_o 7._o what_o become_v of_o the_o body_n of_o light_n when_o it_o die_v ibid._n §_o 8._o a_o experiment_n of_o some_o who_o pretend_v that_o light_n may_v be_v precipitate_v into_o powder_n pag._n 51._o §_o 9_o the_o author_n opinion_n concern_v lamp_n pretend_v to_o have_v be_v find_v in_o tomb_n with_o inconsumptible_a light_n ibid._n chap._n viii_o a_o answer_n to_o three_o other_o objection_n forme_o propose_v against_o light_n be_v a_o substance_n pag._n 53._o §_o 1._o light_n be_v not_o real_o in_o every_o part_n of_o the_o room_n it_o enlighten_v nor_o fill_v entire_o any_o sensible_a part_n of_o it_o though_o it_o seem_v to_o we_o to_o do_v so_o ibid._n §_o 2._o tha_z least_o sensible_a point_n of_o a_o diaphanous_a body_n have_v room_n sufficient_a to_o contain_v both_o air_n and_o light_n together_o with_o a_o multitude_n of_o beam_n issue_v from_o several_a light_n without_o penetrate_v one_o another_o pag._n 54._o §_o 3._o that_o light_n do_v not_o enlighten_v any_o room_n in_o a_o instant_n and_o that_o the_o great_a celerity_n of_o its_o motion_n do_v make_v it_o inperceptible_a to_o our_o sense_n pag._n 56._o §_o 4._o the_o reason_n why_o the_o motion_n of_o light_n be_v not_o discern_v comingtowarde_n we_o and_o that_o there_o be_v some_o real_a tardity_n in_o it_o pag._n 58._o §_o 5._o the_o planet_n be_v not_o certain_o ever_o in_o that_o place_n where_o they_o appear_v to_o be_v pag._n 59_o §_o 6._o the_o reason_n why_o light_n be_v a_o body_n do_v not_o by_o its_o motion_n shatter_v other_o body_n into_o piece_n ibid._n §_o 7._o the_o reason_n why_o the_o body_n of_o light_n be_v never_o perceive_v to_o be_v fan_v by_o the_o wind_n pag._n 61._o §_o 8._o the_o reason_n for_o and_o against_o light_n be_v a_o body_n compare_v together_o pag._n 62._o §_o 9_o a_o summary_n repetition_n of_o the_o reason_n which_o prove_v that_o light_n be_v fire_n ibidem_fw-la chap._n ix_o of_o local_a motion_n in_o common_a pag_n 63._o §_o 1._o no_o local_a motion_n can_v be_v perform_v without_o succession_n ibid._n §_o 2._o time_n be_v the_o common_a measure_n of_o all_o succession_n pag._n 64._o §_o 3._o what_o velocity_n be_v and_o that_o it_o can_v not_o be_v infinite_a ibid._n §_o 4._o no_o force_n so_o little_a that_o be_v not_o able_a to_o move_v the_o great_a weight_n imaginable_a pag._n 65._o §_o 5._o the_o chief_a principle_n of_o mechanike_n deduce_v out_o of_o the_o former_a discourse_n pag._n 66._o §_o 6._o no_o movable_a can_v pass_v from_o rest_n to_o any_o determinate_a degree_n of_o velocity_n or_o from_o a_o lesser_a degree_n to_o a_o great_a without_o pass_v through_o all_o the_o intermediate_v degree_n which_o be_v below_o the_o obtain_a degree_n pag._n 67._o §_o 7._o the_o condition_n which_o help_v to_o motion_n in_o the_o movable_a be_v three_o in_o the_o medium_n one_o pag_n 69._o §_o 8._o no_o body_n have_v any_o intrinsical_a virtue_n to_o move_v itself_o towards_o any_o determinate_a part_n of_o the_o universe_n pag._n 70._o §_o 9_o the_o increase_n of_o motion_n be_v always_o make_v in_o the_o proportion_n of_o the_o odd_a number_n ibid._n §_o 10._o no_o motion_n can_v increase_v for_o ever_o without_o come_v to_o a_o period_n pag._n 72._o §_o 11._o certain_a problem_n resolve_v concern_v the_o proportion_n of_o some_o move_a agent_n compare_v to_o their_o effect_n pag_n 73._o §_o 12._o when_o a_o movable_a come_v to_o rest_v the_o motion_n do_v decrease_v according_a to_o the_o rule_n of_o increase_n pag._n 75._o chap._n x._o of_o gravity_n and_o levity_n and_o of_o local_a motion_n common_o term_v natural_a pag._n 76._o §_o 1._o those_o motion_n be_v call_v natural_a which_o have_v constant_a cause_n and_o those_o violent_a which_o be_v contrary_a to_o they_o ibid._n §_o 2._o the_o first_o and_o most_o general_a operation_n of_o the_o sun_n be_v the_o make_n and_o raise_v of_o atom_n ibid._n §_o 3._o the_o light_n rebound_v from_o the_o earth_n with_o atom_n cause_v two_o stream_n in_o the_o air_n the_o one_o ascend_v the_o other_o descend_v and_o both_o of_o they_o in_o a_o perpendicular_a line_n pag._n 77._o §_o 4._o a_o dense_a body_n place_v in_o the_o air_n between_o the_o ascend_a and_o descend_v stream_n must_v needs_o descend_v pag._n 78._o §_o 5._o a_o more_o particular_a explication_n of_o all_o the_o former_a doctrine_n touch_v gravity_n pag._n 79._o §_o 6._o gravity_n and_o levity_n do_v not_o signify_v a_o intrinsical_a inclination_n to_o such_o a_o motion_n in_o the_o body_n themselves_o which_o be_v term_v heavy_a and_o light_a pag._n 81._o §_o 7._o the_o more_o dense_a a_o body_n be_v the_o more_o swift_o it_o descend_v ibid._n §_o 8._o the_o velocity_n of_o body_n descend_v do_v not_o increase_v in_o proportion_n to_o the_o difference_n that_o may_v be_v between_o their_o several_a density_n pag._n 82._o §_o 9_o more_n or_o less_o gravity_n do_v produce_v a_o swift_a or_o a_o slow_a descend_v of_o a_o heavy_a body_n aristotle_n argument_n to_o disprove_v motion_n in_o vacuo_fw-la be_v make_v good_a pag._n 84._o §_o 10._o the_o reason_n why_o at_o the_o inferior_a quarter_n of_o a_o circle_n a_o body_n do_v descend_v fast_o by_o the_o arch_n of_o that_o quarter_n then_o by_o the_o chord_n if_o it_o pag._n 85._o chap._n xi_o a_o answer_n to_o objection_n against_o the_o cause_n of_o natural_a motion_n avow_a in_o the_o former_a chapter_n and_o a_o refutation_n of_o the_o contrary_a opinion_n pag._n 86._o §_o 1._o the_o first_o objection_n answer_v why_o a_o hollow_a body_n descend_v slow_a than_o a_o solid_a one_o pag._n 86._o §_o 2._o the_o second_o objection_n answer_v and_o the_o reason_n show_v why_o atom_n do_v continual_o overtake_v the_o descend_v dense_a body_n pag._n 88_o §_o 3._o a_o curious_a question_n leave_v undecided_a pag._n 89._o §_o 4._o the_o four_o objection_n answer_v why_o the_o descent_n of_o the_o same_o heavy_a body_n be_v equal_a in_o so_o great_a inequality_n of_o the_o atom_n which_o cause_v it_o ibidem_fw-la §_o 5._o the_o reason_n why_o the_o
of_o intention_n and_o remission_n and_o other_o do_v not_o ibid._n §_o 7._o that_o in_o every_o part_n of_o our_o habitable_a world_n all_o the_o four_o element_n be_v find_v pure_a in_o small_a atom_n but_o not_o in_o any_o great_a bulk_n pag._n 142._o chap._n xvii_o of_o rarefaction_n and_o condensation_n the_o two_o first_o motion_n of_o particular_a body_n pag._n 144._o §_o 1._o the_o author_n intent_n in_o this_o and_o the_o follow_a chapter_n ibid._n §_o 2._o that_o body_n may_v be_v rarify_v both_o by_o outward_a heat_n and_o how_o this_o be_v perform_v pag._n 145._o §_o 3._o of_o the_o great_a effect_n for_n rarefaction_n pag._n 147._o §_o 4._o the_o first_o manner_n of_o condensation_n by_o heat_n pag._n 148._o §_o 5._o the_o second_o manner_n of_o condensation_n by_o cold_a pag._n 149._o §_o 6._o that_o ice_n be_v not_o water_v rarify_v but_o condense_v pag._n 151._o §_o 7._o how_o wind_n snow_n and_o hail_n be_v make_v and_o wind_n by_o rain_n allay_v pag._n 152._o §_o 8._o how_o part_n of_o the_o same_o or_o diverse_a body_n be_v join_v more_o strong_o together_o by_o condensation_n pag._n 153._o §_o 9_o vacuite_n can_v not_o be_v the_o reason_n why_o water_n impregnate_v to_o the_o full_a with_o one_o kind_n of_o salt_n will_v notwithstanding_o receive_v more_o of_o a_o other_o pag._n 154._o §_o 10._o the_o true_a reason_n of_o the_o former_a effect_n pag._n 155._o §_o 11._o the_o reason_n why_o body_n of_o the_o same_o nature_n do_v join_v more_o easy_o together_o than_o other_o pag._n 156._o chap._n xviii_o of_o a_o other_o motion_n belong_v to_o particular_a body_n call_v attraction_n and_o of_o certain_a operation_n term_v magical_a pag._n 157._o §_o 1._o what_o attraction_n be_v and_o from_o whence_o it_o proceed_v ibid._n §_o 2._o the_o true_a sense_n of_o the_o maxim_n that_o nature_n abhor_v from_o vacuity_n pag._n 158._o §_o 3._o the_o true_a reason_n of_o attraction_n pag._n 159._o §_o 4._o water_n may_v be_v bring_v by_o the_o force_n of_o attraction_n to_o what_o height_n soever_o pag._n 160._o §_o 5._o the_o doctrine_n touch_v the_o attraction_n of_o water_n in_o syphon_n ibid._n §_o 6._o that_o the_o syphon_n do_v not_o prove_v water_n to_o weigh_v in_o its_o own_o orb_n pag._n 161._o §_o 7._o concern_v attraction_n cause_v by_o fire_n pag._n 162._o §_o 8._o concern_v attraction_n make_v by_o virtue_n of_o hot_a body_n amulet_n etc_n pag._n 163._o §_o 9_o the_o natural_a reason_n give_v for_o diverse_a operation_n esteem_v by_o some_o to_o be_v magical_a ibid._n chap._n xix_o of_o three_o other_o motion_n belong_v to_o particular_a body_n filtration_n restitution_n and_o electricall_a attraction_n pag._n 166._o §_o 1._o what_o be_v filtration_n and_o how_o it_o be_v effect_v ibid._n §_o 2._o what_o cause_v the_o water_n in_o filtration_n to_o ascend_v pag._n 167._o §_o 3._o why_o the_o filter_n will_v not_o drop_n unless_o the_o label_n hang_v low_a than_o the_o water_n ibid._n §_o 4._o of_o the_o motion_n of_o restitution_n and_o why_o some_o body_n stand_v bend_v other_o not_o pag._n 168._o §_o 5._o why_o some_o body_n return_v only_o in_o part_n to_o their_o natural_a figure_n other_o entire_o pag._n 170._o §_o 6._o concern_v the_o nature_n of_o those_o body_n which_o do_v shrink_v and_o stretch_v pag._n 171._o §_o 7._o how_o great_a and_o wonderful_a effect_n proceed_v from_o small_a plain_a and_o simple_a principle_n ibid._n §_o 8._o concern_v electricall_a attraction_n and_o the_o cause_n of_o it_o pag._n 172._o §_o 9_o cabeus_n his_o opinion_n refute_v concern_v the_o cause_n of_o electricall_a motion_n pag._n 174._o chap._n xx._n of_o the_o loadestone_n generation_n and_o its_o particular_a motion_n pag._n 175._o §_o 1._o the_o extreme_a heat_n of_o the_o sun_n under_o the_o zodiac_n draw_v a_o stream_n of_o air_n from_o each_o pole_n into_o the_o torride_a zone_n ibid._n §_o 2._o the_o atom_n of_o these_o two_o stream_n come_v together_o be_v apt_a to_o incorporate_v with_o one_o a_o other_o pag._n 176._o §_o 3._o by_o the_o meeting_n and_o mingle_v together_o of_o these_o stream_n at_o the_o equator_fw-la diverse_a rivulet_n of_o atom_n of_o each_o pole_n be_v continuate_v from_o one_o pole_n to_o te_fw-mi other_z pag._n 177._o §_o 4._o of_o these_o atom_n incorporate_v with_o some_o fit_a matter_n in_o the_o bowel_n of_o the_o earth_n be_v make_v a_o stone_n pag._n 179._o §_o 5._o this_o stone_n work_v by_o emanation_n join_v with_o agree_v stream_n that_o meet_v they_o in_o the_o air_n and_o in_o fine_a it_o be_v a_o loadestone_n ibid._n §_o 6._o a_o method_n for_o make_v experience_n upon_o any_o subject_n pag._n 181._o §_o 7._o the_o loadestone_n generation_n by_o atom_n flow_v from_o both_o pole_n be_v confirm_v by_o experiment_n observe_v in_o the_o stone_n itself_o ibid._n §_o 8._o experiment_n to_o prove_v that_o the_o loadestone_n work_v by_o emanation_n meet_v with_o agree_v stream_n pag._n 182._o chap._n xxi_o position_n draw_v out_o of_o the_o former_a doctrine_n and_o confirm_v by_o experimental_a proof_n pag._n 185._o .1_o the_o operation_n of_o the_o loadestone_n be_v wrought_v by_o body_n and_o not_o by_o quality_n ibid._n §_o 2._o objection_n against_o the_o former_a position_n answer_v pag._n 186._o §_o 3._o the_o loadestone_n be_v imbue_v with_o his_o virtue_n from_o a_o other_o body_n ibid._n §_o 4._o the_o virtue_n of_o the_o loadestone_n be_v a_o double_a and_o not_o one_o simple_a virtue_n 188._o §_o 5._o the_o virtue_n of_o the_o laodestone_n work_v more_o strong_o in_o the_o pole_n of_o it_o then_o in_o any_o other_o part_n ibid._n §_o 6._o the_o laodestone_n send_v forth_o its_o emanation_n spherical_o which_o be_v of_o two_o kind_n and_o each_o kind_n be_v strong_a in_o that_o hemisphere_n through_o who_o polary_a part_n they_o issue_v out_o ibid._n §_o 7._o put_v two_o loadestone_n within_o the_o sphere_n of_o one_o a_o other_o every_o part_n of_o one_o laodestone_n do_v not_o agree_v with_o every_o part_n of_o the_o other_o loadestone_n pag_n 189._o §_o 8._o concern_v the_o declination_n and_o other_o respect_n of_o a_o needle_n towards_o the_o loadestone_n it_o touch_v ibid._n §_o 9_o the_o virtue_n of_o the_o laodestone_n go_v from_o end_n to_o end_v in_o line_n almost_o paralelle_n to_o the_o axis_fw-la pag._n 191._o §_o 10._o the_o virtue_n of_o loadestone_n be_v not_o perfect_o spherical_a though_o the_o stone_n be_v such_o pag._n 192._o §_o 11._o the_o intention_n of_o nature_n in_o all_o the_o operation_n of_o the_o loadestone_n be_v to_o make_v a_o union_n betwixt_o the_o attractive_a and_o attract_a body_n ibid._n §_o 12._o the_o main_a globe_n of_o the_o earth_n be_v not_o a_o loadestone_n ibid._n §_o 13._o the_o laodestone_n be_v generate_v in_o all_o part_n or_o climate_n of_o the_o earth_n pag._n 193._o §_o 14._o the_o conformity_n betwixt_o the_o two_o motion_n of_o magnetike_a thing_n and_o of_o heavy_a thing_n ibid._n chap._n xxii_o a_o solution_n of_o certain_a problem_n concern_v the_o loadestone_n and_o a_o short_a sum_n of_o the_o whole_a doctrine_n touch_v it_o pag._n 194._o §_o 1._o which_o be_v the_o north_n and_o which_o the_o south_n pole_n of_o a_o loadestone_n ibid._n §_o 2._o whether_o any_o body_n beside_o magnetike_a one_o be_v attractive_a ibid._n §_o 3._o whether_o a_o iron_n place_v perpendicular_o towards_o the_o earth_n do_v get_v a_o magnetical_a virtue_n of_o point_v towards_o the_o north_n or_o towards_o the_o south_n in_o that_o end_n that_o lie_v downwards_o pag._n 195._o §_o 4._o why_o loadestone_n affect_v iron_n better_o than_o one_o a_o other_o ibid._n §_o 5._o gilbert_n reason_v refute_v touch_v a_o cap_a loadestone_n that_o take_v up_o more_o iron_n than_o one_o not_o cap_v and_o a_o iron_n impregnate_v that_o in_o some_o case_n draw_v more_o strong_o than_o the_o stone_n itself_o ibid._n §_o 6._o galileus_n his_o opinion_n touch_v the_o former_a effect_n refute_v pag._n 196._o §_o 7._o the_o author_n solution_n to_o the_o former_a question_n pag._n 197._o §_o 8._o the_o reason_n why_o in_o the_o former_a case_n a_o lesser_a loadestone_n do_v draw_v the_o interjacent_a iron_n from_o the_o great_a pag._n 198._o §_o 9_o why_o the_o variation_n of_o a_o touch_v needle_n from_o the_o north_n be_v great_a the_o near_a you_o go_v to_o the_o pole_n pag._n 199._o §_o 10._o whether_o in_o the_o same_o part_n of_o the_o world_n a_o touch_v needle_n may_v at_o one_o time_n vary_v more_o from_o the_o north_n and_o at_o a_o other_o time_n less_o pag._n 200._o §_o 11._o the_o whole_a doctrine_n of_o the_o loadestone_n sum_v up_o in_o short_a pag._n 201._o chap._n xxiii_o a_o description_n of_o the_o two_o sort_n of_o live_a creature_n plantes_n and_o animal_n and_o how_o they_o be_v frame_v in_o common_a
the_o same_o biggenesse_n and_o consequent_o be_v convert_v into_o a_o great_a quantity_n of_o fire_n and_o air_n oil_n will_v make_v much_o more_o flame_n than_o spirit_n of_o wine_n that_o be_v far_o rare_a than_o it_o these_o and_o such_o like_a consideration_n part_n have_v much_o perplex_a philosopher_n and_o have_v drive_v they_o into_o diverse_a thought_n to_o find_v out_o the_o reason_n of_o they_o some_o observe_v that_o the_o divide_n of_o a_o body_n into_o little_a part_n make_v it_o less_o apt_a to_o descend_v then_o when_o it_o be_v in_o great_a have_v believe_v the_o whole_a cause_n of_o litghnesse_n and_o rarity_n to_o be_v derive_v from_o division_n as_o for_o example_n they_o find_v that_o lead_n cut_n into_o little_a piece_n will_v not_o go_v down_o so_o fast_o in_o water_n as_o when_o it_o be_v in_o bulk_n and_o it_o may_v be_v reduce_v into_o so_o small_a atom_n that_o it_o will_v for_o some_o space_n swim_v upon_o the_o water_n like_o dust_n of_o wood_n which_o assumption_n be_v prove_v by_o the_o great_a galileus_n unto_o who_o excellent_a wit_n and_o admirable_a industry_n the_o world_n be_v behold_v not_o only_o for_o his_o wonderful_a discovery_n make_v in_o the_o heaven_n but_o also_o for_o his_o accurate_a and_o learned_a declare_v of_o those_o very_a thing_n that_o lie_v under_o our_o foot_n he_o about_o the_o 90_o page_n of_o his_o first_o dialogue_n of_o motion_n do_v clear_o demonstrate_v how_o any_o real_a medium_n must_v of_o necessity_n resist_v more_o the_o descent_n of_o a_o little_a piece_n of_o lead_n or_o any_o other_o weighty_a matter_n than_o it_o will_v a_o great_a piece_n and_o the_o resistance_n will_v be_v great_a and_o great_a as_o the_o piece_n be_v lesser_a and_o lesser_a so_o that_o as_o the_o piece_n be_v make_v less_o they_o will_v in_o the_o same_o medium_n sink_v the_o slow_a and_o do_v seem_v to_o have_v acquire_v a_o new_a nature_n of_o lightness_n by_o their_o diminution_n not_o only_o of_o have_v less_o weight_n in_o they_o then_o they_o have_v as_o half_o a_o ounce_n be_v less_o than_o a_o whole_a ounce_n but_o also_o of_o have_v in_o themselves_o a_o less_o proportion_n of_o weight_n to_o their_o bulk_n than_o they_o have_v as_o a_o pound_n of_o cork_n be_v in_o regard_n of_o its_o magnitude_n light_a than_o a_o pound_n of_o lead_n so_o as_o they_o conclude_v that_o the_o thing_n who_o continue_a part_n be_v the_o lesser_a be_v in_o its_o own_o nature_n the_o light_a and_o the_o rare_a and_o other_o thing_n who_o continue_a part_n be_v great_a they_o be_v heavy_a and_o denser_n discover_v but_o this_o discourse_n reach_v not_o home_n for_o by_o it_o the_o weight_n of_o any_o body_n be_v discover_v by_o the_o proportion_n it_o have_v to_o the_o medium_n in_o which_o it_o descend_v it_o must_v ever_o suppose_v a_o body_n light_a than_o itself_o in_o which_o it_o may_v sink_v and_o go_v to_o the_o bottom_n now_o of_o that_o light_a body_n i_o inquire_v what_o make_v it_o be_v so_o and_o you_o must_v answer_v by_o what_o you_o have_v conclude_v that_o it_o be_v light_a than_o the_o other_o because_o the_o part_n of_o it_o be_v less_o and_o more_o sever_v from_o one_o a_o other_o for_o if_o they_o be_v as_o close_v together_o their_o division_n avail_v they_o nothing_o since_o thing_n stick_v fast_o together_o do_v work_n as_o if_o they_o be_v but_o one_o and_o so_o a_o pound_n of_o lead_n though_o it_o be_v file_v into_o small_a dust_n if_o it_o be_v compact_v hard_o together_o will_v sink_v as_o fast_o as_o if_o it_o be_v in_o one_o bulk_n now_o then_o allow_v the_o little_a part_n to_o be_v separate_v i_o ask_v what_o other_o body_n fill_v up_o the_o space_n between_o those_o little_a part_n of_o the_o medium_n in_o which_o your_o heavy_a body_n descend_v for_o if_o the_o part_n of_o water_n be_v more_o sever_v than_o the_o part_n of_o lead_n there_o must_v be_v some_o other_o substance_n to_o keep_v the_o part_n of_o it_o a_o sunder_o let_v we_o suppose_v this_o to_o be_v air_n and_o i_o ask_v whether_o a_o equal_a part_n of_o air_n be_v as_o heavy_a as_o so_o much_o water_n or_o whether_o it_o be_v not_o if_o you_o say_v it_o be_v then_o the_o compound_n of_o water_n and_o air_n must_v be_v as_o heavy_a as_o lead_v see_v that_o their_o part_n one_o with_o a_o other_o be_v as_o much_o compact_v as_o the_o part_n of_o lead_n be_v for_o there_o be_v no_o difference_n whether_o those_o body_n who_o little_a part_n be_v compact_v together_o be_v of_o the_o same_o substance_n or_o of_o diverse_a or_o whether_o the_o one_o be_v divide_v into_o small_a part_n than_o the_o other_o or_o no_o so_o they_o be_v of_o equal_a weight_n in_o regard_n of_o make_v the_o whole_a equal_o heavy_a as_o you_o may_v experience_n if_o you_o mingle_v pinnedust_a with_o a_o sand_n of_o equal_a weight_n though_o it_o be_v beat_v into_o far_o small_a division_n than_o the_o pinnedust_n and_o put_v they_o in_o a_o bag_n together_o but_o if_o you_o say_v that_o air_n be_v not_o so_o heavy_a as_o water_n it_o must_v be_v because_o every_o part_n of_o air_n have_v again_o its_o part_n more_o sever_v by_o some_o other_o body_n than_o the_o part_n of_o water_n be_v sever_v by_o air_n and_o then_o i_o make_v the_o same_o instance_n of_o that_o body_n which_o sever_v the_o part_n of_o air_n and_o so_o att_z the_o last_o since_o there_o can_v not_o actual_o be_v a_o infinite_a process_n of_o body_n one_o light_a than_o a_o other_o you_o must_v come_v to_o one_o who_o little_a part_n fill_v the_o pore_n and_o space_n between_o the_o part_n of_o the_o other_o have_v no_o space_n in_o themselves_o to_o be_v fill_v up_o but_o as_o soon_o as_o you_o acknowledge_v such_o a_o body_n to_o be_v light_a and_o rare_a than_o all_o the_o rest_n you_o contradict_v and_o destroy_v all_o you_o say_v before_o for_o by_o reason_n of_o its_o have_a no_o pore_n it_o follow_v by_o your_o rule_n that_o the_o little_a part_n of_o it_o must_v be_v as_o heavy_a if_o not_o heavy_a than_o the_o little_a part_n of_o the_o same_o bigness_n of_o that_o body_n who_o pore_n it_o fill_v and_o consequent_o it_o be_v prove_v by_o the_o experience_n we_o allege_v of_o pinnedust_n mingle_v with_o sand_n that_o the_o little_a part_n of_o it_o can_v not_o by_o their_o mingle_n with_o the_o part_n of_o the_o body_n in_o which_o it_o be_v immediate_o contain_v make_v that_o light_a than_o it_o will_v be_v if_o these_o little_a part_n be_v not_o mingle_v with_o it_o nor_o will_v both_o their_o part_n mingle_v with_o the_o body_n which_o immediate_o contain_v they_o make_v that_o body_n light_a and_o so_o proceed_v on_o in_o the_o same_o sort_n through_o all_o the_o mingle_a body_n till_o you_o come_v to_o the_o last_o that_o be_v immediate_o mingle_v with_o water_n you_o will_v make_v water_n nothing_o the_o light_a for_o be_v mingle_v with_o all_o these_o and_o by_o consequence_n it_o shall_v be_v as_o heavy_a and_o as_o dense_a as_o lead_v now_o that_o which_o deceive_v the_o author_n of_o this_o opiniion_n be_v that_o they_o have_v not_o a_o right_a intelligence_n of_o the_o cause_n which_o make_v little_a part_n of_o body_n natural_o heavy_a descend_v slow_o in_o regard_n of_o the_o velocity_n of_o great_a part_n of_o the_o same_o body_n descend_v the_o doctrine_n of_o which_o we_o intend_v to_o deliver_v hereafter_o other_o therefore_o perceive_v this_o rule_n to_o fall_v short_a body_n have_v endeavour_v to_o piece_n it_o out_o by_o the_o mixtion_n of_o vacuity_n among_o body_n believe_v it_o be_v that_o which_o make_v one_o rare_a than_o a_o other_o which_o mixtion_n they_o do_v not_o put_v always_o immediate_a to_o the_o main_a body_n they_o consider_v but_o if_o it_o have_v other_o rare_a and_o light_a body_n mingle_v with_o it_o they_o conceive_v this_o mixtion_n immediate_a only_o to_o the_o rare_a or_o light_a as_o for_o example_n a_o crystal_n be_v light_a and_o consequent_o rare_a than_o a_o diamond_n they_o will_v not_o say_v that_o there_o be_v more_o vacuity_n in_o a_o crystal_n then_o in_o a_o diamond_n but_o that_o the_o pore_n of_o a_o crystal_n be_v great_a and_o that_o consequent_o there_o be_v more_o air_n in_o a_o crystal_n to_o fill_v the_o pore_n of_o it_o then_o be_v in_o a_o diamond_n and_o the_o vacuity_n be_v in_o the_o air_n which_o abound_v in_o a_o crystal_n more_o than_o in_o a_o diamond_n make_v that_o light_a and_o rare_a than_o this_o by_o the_o more_o vacuity_n that_o be_v in_o the_o great_a quantity_n of_o air_n which_o be_v migle_v with_o it_o but_o against_o this_o supposition_n a_o powerful_a adversary_n be_v urge_v for_o aristotle_n in_o his_o 4_o book_n
and_o give_v the_o like_a motion_n to_o any_o body_n they_o find_v in_o their_o way_n if_o it_o be_v susceptible_a of_o such_o a_o motion_n which_o it_o be_v evident_a that_o all_o body_n be_v unless_o they_o be_v strike_v by_o some_o contrary_a impulse_n for_o since_o that_o a_o body_n be_v in_o a_o place_n be_v nothing_o else_o but_o the_o continuity_n of_o its_o outside_n to_o the_o inside_n of_o the_o body_n that_o contain_v it_o and_o be_v its_o place_n it_o can_v have_v no_o other_o repugnance_n to_o local_a motion_n which_o be_v nothing_o else_o but_o a_o successive_a change_n of_o place_n beside_o this_o continuity_n now_o the_o nature_n of_o density_n be_v the_o power_n of_o divide_v and_o every_o least_o power_n have_v some_o force_n and_o efficacy_n as_o we_o have_v show_v above_o it_o follow_v that_o the_o stroke_n of_o every_o atom_n either_o descend_v or_o ascend_v will_v work_v some_o thing_n upon_o any_o body_n though_o never_o so_o big_a it_o chance_v to_o encounter_v with_o and_o strike_v upon_o in_o its_o way_n unless_o there_o be_v as_o strong_a a_o impulse_n the_o contrary_a way_n to_o oppose_v it_o but_o it_o be_v determine_v that_o the_o descend_a atom_n be_v denser_n then_o those_o that_o ascend_v it_o follow_v that_o the_o descend_v one_o will_v prevail_v and_o consequent_o all_o dense_a body_n must_v necessary_o tend_v downwards_o to_o the_o centre_n which_o be_v to_o be_v heavy_a if_o some_o other_o more_o dense_a body_n do_v not_o hinder_v they_o out_o of_o this_o discourse_n light_a we_o may_v conclude_v that_o there_o be_v no_o such_o thing_n among_o body_n as_o positive_a gravity_n or_o levity_n but_o that_o their_o course_n upwardes_o or_o downwards_o happen_v unto_o they_o by_o the_o order_n of_o nature_n which_o by_o outward_a cause_n give_v they_o a_o impulse_n one_o of_o these_o way_n without_o which_o they_o will_v rest_v quiet_o wheresoever_o they_o be_v as_o be_v of_o themselves_o indifferent_a to_o any_o motion_n but_o 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ascend_v in_o water_n so_o also_o will_v any_o other_o body_n descend_v if_o it_o light_v among_o other_o more_o rare_a than_o itself_o and_o will_v ascend_v if_o it_o light_v among_o body_n that_o be_v more_o dense_a than_o it_o and_o we_o term_v body_n light_a and_o heavy_a only_o according_a to_o the_o course_n which_o we_o usual_o see_v they_o take_v now_o proceed_v further_o on_o descend_v and_o consider_v how_o there_o be_v various_a degree_n of_o density_n or_o gravity_n it_o be_v irrational_a to_o conceive_v that_o all_o body_n shall_v descend_v at_o the_o same_o rate_n and_o keep_v equal_a pace_n with_o one_o a_o other_o in_o their_o journey_n downwards_o for_o as_o two_o knife_n whereof_o one_o have_v a_o keen_a edge_n than_o the_o other_o be_v press_v with_o equal_a strength_n into_o like_a yield_a matter_n the_o sharp_a will_v cut_v deep_a than_o the_o other_o so_o if_o of_o two_o body_n one_o be_v more_o dense_n than_o the_o other_o that_o which_o be_v so_o will_v cut_v the_o air_n more_o powerful_o and_o will_v descend_v fast_o than_o the_o other_o for_o in_o this_o case_n density_n may_v be_v compare_v to_o the_o knife_n edge_n since_o in_o it_o consist_v the_o power_n of_o divide_v as_o we_o have_v heretofore_o determine_v and_o therefore_o the_o press_v they_o downwards_o by_o the_o descend_a atom_n be_v equal_a in_o both_o or_o peradventure_o great_a in_o the_o more_o dense_a body_n as_o anon_o we_o shall_v have_v occasion_n to_o touch_v and_o there_o be_v no_o other_o cause_n to_o determine_v they_o that_o way_n the_o effect_n of_o division_n must_v be_v the_o great_a where_o the_o divider_n be_v the_o more_o powerful_a which_o the_o more_o dense_a body_n be_v and_o therefore_o cut_v more_o strong_o through_o the_o resistance_n of_o the_o air_n and_o consequent_o pass_v more_o swift_o that_o way_n it_o be_v determine_v to_o move_v density_n i_o do_v not_o mean_v that_o the_o velocity_n of_o their_o descent_n shall_v be_v in_o the_o same_o proportion_n to_o one_o a_o other_o as_o their_o density_n be_v for_o beside_o their_o density_n those_o other_o consideration_n which_o we_o have_v discourse_v of_o above_o when_o we_o examine_v the_o cause_n of_o velocity_n in_o motion_n must_v likewise_o be_v balance_v and_o out_o of_o the_o comparison_n of_o all_o they_o not_o out_o of_o the_o consideration_n of_o any_o one_o alone_a result_v the_o difference_n of_o their_o velocity_n and_o that_o neither_o but_o in_o as_o much_o as_o concern_v the_o consideration_n of_o the_o movable_n for_o to_o make_v the_o calculation_n exact_a the_o medium_n must_v likewise_o be_v consider_v as_o by_o and_o by_o we_o shall_v declare_v for_o since_o the_o motion_n depend_v of_o all_o they_o together_o although_o there_o shall_v be_v difference_n between_o the_o movable_n in_o regard_n of_o one_o only_a and_o that_o the_o rest_n be_v equal_a yet_o the_o proportion_n of_o the_o difference_n of_o their_o motion_n must_v not_o follow_v the_o proportion_n of_o their_o difference_n in_o that_o one_o regard_n because_o their_o difference_n consider_v single_a in_o that_o regard_n will_v have_v one_o proportion_n and_o with_o the_o addition_n of_o the_o other_o consideration_n though_o alike_o in_o both_o to_o their_o difference_n in_o this_o they_o will_v have_v a_o other_o as_o for_o example_n reckon_v the_o density_n of_o one_o mooveable_a to_o be_v double_a the_o density_n of_o a_o other_o mooveable_a so_o that_o in_o that_o regard_n it_o have_v two_o degree_n of_o power_n to_o descend_v whereas_o the_o other_o have_v but_o one_o suppose_v then_o the_o other_o cause_n of_o their_o descent_n to_o be_v alike_o in_o both_o and_o reckon_v they_o all_o three_o and_o then_o join_v these_o three_o to_o the_o one_o which_o be_v cause_v by_o the_o density_n in_o one_o of_o the_o movable_n as_o likewise_o to_o the_o two_o which_o be_v cause_v by_o the_o density_n in_o the_o other_o mooveable_a and_o you_o will_v find_v that_o thus_o 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which_o be_v easy_o perceive_v in_o cut_v of_o flesh_n or_o bread_n be_v not_o to_o be_v distinguish_v in_o divide_v of_o water_n or_o oil_n and_o likewise_o in_o weight_n a_o pound_n and_o a_o scruple_n will_v bear_v down_o a_o dram_n in_o no_o sensible_a proportion_n of_o velocity_n more_o than_o a_o pound_n alone_o will_v do_v and_o yet_o put_v a_o pound_n in_o that_o scale_n instead_o of_o the_o dram_n and_o then_o the_o difference_n of_o the_o scruple_n will_v be_v very_o notable_a so_o then_o those_o body_n who_o difference_n of_o descend_v in_o water_n be_v very_o sensible_a because_o of_o the_o great_a proportion_n of_o weight_n in_o water_n to_o the_o body_n that_o descend_v in_o it_o will_v yield_v no_o sensible_a difference_n of_o velocity_n when_o they_o descend_v in_o air_n by_o reason_n of_o the_o great_a disproportion_n of_o weight_n between_o
air_n and_o the_o body_n that_o descend_v in_o it_o the_o reason_n of_o this_o will_v clear_o show_v itself_o in_o abstract_a proportion_n thus_o suppose_v air_n to_o have_v one_o degree_n of_o density_n and_o water_n to_o have_v 400_o then_o let_v the_o mooveable_a a_o have_v 410_o degree_n of_o density_n and_o the_o mooveable_a b_o have_v 500_o now_o compare_v their_o motion_n to_o one_o a_o other_o in_o the_o several_a medium_n of_o air_n and_o water_n the_o exuperance_n of_o the_o density_n of_o a_o to_o water_n be_v 10_o degree_n but_o the_o exuperace_n of_o b_o unto_o the_o same_o water_n be_v 100_o degree_n so_o that_o b_o must_v move_v in_o water_n swift_a than_o a_o in_o the_o proportion_n of_o 100_o to_o ten_o that_o be_v of_o 10_o to_o one_o then_o let_v we_o compre_fw-it the_o exuperance_fw-fr of_o the_o two_o movable_n over_o air_n a_o be_v 409_o time_n more_o dense_a than_o air_n but_o b_o be_v 499_o time_n more_o dense_a than_o it_o by_o which_o account_n the_o motion_n of_o b_o must_v be_v in_o that_o medium_n swift_a than_o the_o motion_n of_o a_o in_o the_o proportion_n of_o 499_o to_o 409_o that_o be_v about_o 50_o to_o 41_o which_o to_o avoid_v fraction_n we_o may_v account_v as_o 10_o to_o 8._o but_o in_o water_n they_o exceed_v one_o a_o other_o as_o 10_o to_o one_o so_o that_o their_o difference_n of_o velocity_n must_v be_v scarce_o perceptible_a in_o air_n in_o respect_n of_o what_o it_o be_v in_o water_n out_o of_o all_o which_o discourse_n i_o only_o infer_v in_o common_a that_o a_o great_a velocity_n in_o motion_n will_v follow_v the_o great_a density_n of_o the_o mooveable_a without_o determine_v here_o their_o proportion_n which_o i_o leave_v unto_o they_o who_o make_v that_o examination_n their_o task_n for_o thus_o much_o serve_v my_o present_a turn_n wherein_o i_o take_v a_o survey_n of_o nature_n but_o in_o gross_a and_o my_o chief_a drift_n in_o this_o particular_a be_v only_o to_o open_v the_o way_n for_o the_o discover_v how_o 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natural_a body_n but_o that_o all_o the_o effect_n it_o give_v unto_o a_o body_n be_v to_o make_v it_o descend_v or_o not_o descend_v in_o such_o a_o medium_n which_o be_v against_o the_o first_o and_o most_o know_a principle_n that_o be_v in_o body_n to_o wit_n that_o more_o do_v more_o and_o less_o do_v less_o for_o he_o allow_v that_o gravity_n cause_v a_o body_n to_o descend_v and_o yet_o will_v not_o allow_v that_o more_o gravity_n cause_v it_o to_o descend_v more_o i_o wonder_v that_o he_o never_o mark_v how_o in_o a_o pair_n of_o scale_n a_o superproportion_n of_o overweight_n in_o one_o balance_n lift_v up_o the_o other_o fast_o than_o a_o less_o proportion_n of_o overweight_n will_v do_v or_o that_o more_o weight_n hang_v to_o a_o jack_n make_v the_o spit_n turn_v fast_o or_o to_o the_o line_n of_o a_o clock_n make_v it_o go_v fast_o and_o the_o like_a but_o his_o argument_n whereby_o he_o endeavour_v to_o prove_v his_o position_n be_v yet_o more_o wonderful_a for_o find_v in_o pendant_n unequal_a in_o gravity_n that_o the_o light_a go_v in_o the_o same_o time_n almost_o as_o fast_o as_o the_o heavy_a he_o gather_v from_o thence_o that_o the_o different_a weight_n have_v each_o of_o they_o the_o same_o celerity_n and_o that_o it_o be_v the_o opposition_n of_o the_o air_n which_o make_v the_o light_a body_n not_o reach_v so_o far_o at_o each_o undulation_n as_o the_o heavy_a do_v for_o reply_v whereunto_o first_o we_o must_v ask_v he_o whether_o experience_n or_o reason_n teach_v he_o that_o the_o slow_a go_v of_o the_o light_a pendant_n proceed_v only_o from_o the_o medium_n and_o not_o from_o want_n of_o gravity_n and_o when_o he_o shall_v have_v answer_v as_o he_o needs_o must_v that_o experience_n do_v not_o show_v this_o then_o we_o must_v importune_v he_o for_o a_o good_a reason_n but_o i_o do_v not_o find_v that_o he_o bring_v any_o at_o all_o again_o if_o he_o admit_v which_o he_o do_v in_o express_a term_n that_o a_o light_a body_n can_v not_o 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of_o the_o ascend_a atom_n and_o thereby_o determine_v it_o to_o weigh_v to_o the_o centerwardes_o and_o not_o rise_v float_v upwardes_o which_o be_v all_o the_o sensible_a effect_n we_o can_v perceive_v next_o we_o may_v observe_v that_o the_o first_o particular_n of_o the_o objection_n do_v not_o reach_v home_o to_o enfeeble_v our_o doctrine_n in_o this_o particular_a although_o we_o admit_v they_o to_o be_v in_o such_o sort_n as_o they_o be_v propose_v for_o they_o do_v withal_o imply_v such_o a_o perpetual_a variation_n of_o cause_n ever_o favourable_a to_o our_o position_n that_o nothing_o can_v be_v infer_v out_o of_o they_o to_o repugn_v against_o it_o as_o thus_o when_o there_o be_v many_o atom_n descend_v in_o the_o air_n the_o same_o general_a cause_n which_o make_v they_o be_v many_o make_v they_o also_o be_v light_n in_o proportion_n to_o their_o multitude_n and_o so_o when_o they_o be_v few_o they_o be_v heavy_a likewise_o when_o the_o atom_n be_v light_a the_o air_n be_v 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