every_o piece_n of_o it_o though_o infinite_o divide_v the_o same_o propriety_n it_o have_v itself_o this_o magnetical_a virtue_n i_o say_v have_v such_o a_o relation_n and_o be_v force_v thus_o to_o vary_v it_o be_v very_o probable_a that_o the_o internal_a part_n to_o which_o it_o have_v a_o respect_n have_v a_o variation_n likewise_o and_o consequent_o that_o these_o internal_a part_n which_o be_v suppose_v general_o very_o dense_a compact_a and_o very_o close_o and_o solid_o unite_v may_v be_v notwithstanding_o more_o loose_a and_o ununited_a and_o movable_a from_o certain_a cause_n to_o proceed_v therefore_o i_o say_v that_o it_o seem_v very_o probable_a to_o i_o that_o the_o body_n of_o comet_n may_v be_v of_o the_o same_o nature_n and_o constitution_n with_o that_o of_o the_o internal_a part_n of_o the_o earth_n that_o these_o part_n may_v by_o the_o help_n of_o the_o aether_n be_v so_o agitate_a and_o blend_a together_o as_o to_o make_v they_o work_v upon_o and_o dissolve_v each_o other_o in_o the_o same_o manner_n as_o we_o have_v often_o have_v example_n of_o some_o of_o the_o part_n of_o the_o earth_n a_o late_a instance_n of_o which_o be_v at_o mongibel_n or_o aetna_n in_o sicily_n where_o the_o fire_n continue_v for_o a_o long_a time_n and_o produce_v very_o considerable_a effect_n that_o this_o internal_a agitation_n may_v confound_v the_o gravitating_a principle_n and_o so_o leave_v the_o part_n in_o a_o great_a freedom_n to_o be_v dissolve_v by_o the_o encompass_v aether_n which_o be_v the_o agent_n that_o set_v the_o other_o two_o at_o work_n to_o destroy_v each_o other_o that_o it_o may_v at_o length_n prey_n upon_o both_o and_o dissolve_v they_o both_o into_o itself_o and_o consequent_o not_o only_o the_o part_n thus_o dissolve_v be_v elevate_v to_o a_o great_a distance_n from_o the_o centre_n of_o the_o star_n or_o nucleus_n or_o the_o superficies_n of_o it_o who_o gravitating_a or_o attractive_a principle_n be_v much_o destroy_v the_o coma_n be_v in_o this_o comet_n four_o or_o five_o diameter_n of_o the_o star_n or_o nucleus_n but_o have_v give_v those_o part_n leave_v thus_o far_o to_o ramble_v the_o gravitating_a principle_n of_o another_o body_n more_o potent_a act_n upon_o it_o and_o make_v those_o part_n seem_v to_o recede_v from_o the_o centre_n thereof_o though_o real_o they_o be_v but_o as_o it_o be_v leave_v behind_o the_o body_n of_o the_o star_n which_o be_v more_o powerful_o attract_v than_o the_o minute_a steam_a part_n for_o i_o suppose_v the_o gravitating_a power_n of_o the_o sun_n in_o the_o centre_n of_o this_o part_n of_o the_o heaven_n in_o which_o we_o be_v have_v a_o attractive_a power_n upon_o all_o the_o body_n of_o the_o planet_n and_o of_o the_o earth_n that_o move_v about_o it_o and_o that_o each_o of_o those_o again_o have_v a_o respect_n answerable_a whereby_o they_o may_v be_v say_v to_o attract_v the_o sun_n in_o the_o same_o manner_n as_o the_o loadstone_n have_v to_o iron_n and_o the_o iron_n have_v to_o the_o loadstone_n i_o conceive_v also_o that_o this_o attractive_a virtue_n may_v act_v likewise_o upon_o several_a other_o body_n that_o come_v within_o the_o centre_n of_o its_o sphere_n of_o activity_n though_o it_o be_v not_o improbable_a also_o but_o that_o as_o on_o some_o body_n it_o may_v have_v no_o effect_n at_o all_o no_o more_o than_o the_o loadstone_n which_o act_v on_o iron_n have_v upon_o a_o bar_n of_o tin_n lead_v glass_n wood_n etc._n etc._n so_o on_o other_o body_n it_o may_v have_v a_o clean_a contrary_a effect_n that_o be_v of_o protrusion_n thrust_v off_o or_o drive_v away_o as_o we_o find_v one_o pole_n of_o the_o magnet_n do_v the_o end_n of_o a_o needle_n touch_v on_o the_o opposite_a part_n whence_o it_o be_v i_o conceive_v that_o the_o part_n of_o the_o body_n of_o this_o comet_n be_v confound_v or_o jumble_v as_o it_o be_v together_o and_o so_o the_o gravitating_a principle_n destroy_v become_v of_o other_o nature_n than_o they_o be_v before_o and_o so_o the_o body_n may_v cease_v to_o maintain_v its_o place_n in_o the_o universe_n where_o first_o it_o be_v place_v whence_o instead_o of_o continue_v to_o move_v round_o some_o central_a body_n whether_o sun_n or_o planet_n as_o it_o do_v whilst_o it_o maintain_v itself_o entire_a and_o so_o have_v its_o magnetical_a quality_n as_o i_o may_v so_o call_v it_o unconfound_v it_o now_o leave_v that_o circular_a way_n and_o by_o its_o motion_n which_o always_o tend_v to_o a_o straight_a line_n and_o will_v be_v so_o be_v it_o not_o bend_v into_o a_o curve_v by_o the_o attractive_a virtue_n of_o the_o central_a body_n it_o fly_v away_o from_o its_o former_a centre_n by_o the_o tangent_fw-la line_n to_o the_o last_o place_n where_o it_o be_v before_o this_o confusion_n be_v cause_v in_o the_o body_n of_o it_o in_o this_o line_n it_o be_v probable_a it_o pass_v from_o one_o part_n of_o the_o heaven_n to_o another_o and_o so_o pass_v through_o the_o sphere_n of_o the_o activity_n of_o multitude_n of_o central_a body_n in_o the_o pass_n through_o which_o sphere_n it_o be_v not_o improbable_a that_o those_o part_n which_o by_o their_o dissolution_n be_v make_v of_o a_o nature_n differ_v from_o the_o body_n in_o the_o centre_n be_v rather_o expel_v from_o than_o attract_v towards_o it_o and_o so_o be_v by_o this_o dissolution_n rarify_v and_o loosen_v from_o the_o middle_n and_o by_o their_o act_n upon_o one_o another_o and_o dissolution_n of_o the_o aether_n make_v of_o another_o nature_n after_o they_o have_v every_o way_n disperse_v themselves_o to_o a_o considerable_a distance_n from_o their_o proper_a body_n be_v convert_v and_o drive_v in_o a_o way_n almost_o opposite_a to_o that_o expelling_a body_n and_o so_o continue_v to_o be_v drive_v away_o to_o such_o a_o vast_a distance_n as_o to_o make_v out_o that_o prodigious_a length_n of_o the_o tail_n or_o blaze_n of_o some_o comet_n such_o as_o be_v that_o of_o 1618._o which_o as_o kepler_n report_v be_v extend_v to_o 70_o degree_n from_o the_o body_n or_o head_n of_o it_o till_o at_o last_o they_o be_v dissolve_v also_o and_o commix_v with_o the_o aether_n within_o they_o so_o that_o though_o i_o suppose_v the_o attractive_a power_n of_o the_o sun_n or_o other_o central_a body_n may_v draw_v the_o body_n towards_o it_o and_o so_o bend_v the_o motion_n of_o the_o comet_n from_o the_o straight_a line_n in_o which_o it_o tend_v into_o a_o kind_n of_o curve_v who_o concave_a part_n be_v towards_o the_o sun_n by_o reason_n that_o there_o be_v some_o central_a part_n of_o it_o which_o be_v not_o yet_o destroy_v and_o so_o retain_v somewhat_o of_o its_o gravitating_a principle_n yet_o i_o conceive_v that_o all_o those_o part_n of_o the_o comet_n which_o be_v thus_o wrought_v upon_o by_o the_o other_o and_o change_v into_o another_o state_n and_o be_v very_o much_o rarify_v and_o produce_v light_a be_v of_o a_o clean_a contrary_a nature_n and_o recede_v from_o the_o centre_n of_o the_o sun_n much_o after_o the_o same_o manner_n as_o we_o find_v any_o combustible_a body_n with_o we_o as_o coal_n etc._n etc._n where_o we_o find_v that_o the_o body_n of_o the_o coal_n before_o it_o be_v resolve_v into_o smoke_n be_v a_o very_a dense_n and_o very_o heavy_a body_n and_o tend_v to_o the_o centre_n of_o the_o earth_n but_o the_o part_n thereof_o agitate_a by_o the_o air_n and_o aether_n into_o steam_n and_o smoke_n and_o those_o yet_o far_a dissolve_v into_o flame_n do_v tend_v upward_o and_o from_o the_o centre_n of_o the_o earth_n now_o though_o one_o cause_n of_o the_o recess_n of_o flame_n from_o the_o centre_n of_o the_o earth_n be_v the_o gravity_n of_o the_o ambient_fw-la air._n yet_o it_o be_v not_o impossible_a but_o that_o there_o may_v be_v somewhat_o also_o of_o positive_a levity_n conjoin_v therewith_o most_o certain_a it_o be_v that_o there_o must_v be_v a_o tendency_n of_o recede_v as_o well_o as_o a_o tendency_n of_o approach_v the_o centre_n of_o the_o earth_n and_o other_o attract_v body_n and_o there_o may_v be_v much_o say_v for_o the_o supposition_n that_o the_o recess_n of_o the_o pure_a aether_n from_o the_o centre_n be_v the_o cause_n of_o the_o motion_n of_o the_o grosser_n aether_n and_o of_o all_o other_o body_n towards_o it_o though_o there_o be_v also_o very_o considerable_a argument_n against_o it_o but_o this_o discourse_n be_v not_o my_o present_a business_n though_o it_o may_v hereafter_o be_v the_o subject_n of_o a_o lecture_n in_o this_o place_n for_o upon_o it_o do_v depend_v some_o of_o the_o great_a operation_n in_o the_o universe_n and_o as_o in_o the_o history_n of_o the_o creation_n we_o have_v a_o account_n of_o the_o production_n of_o light_n immediate_o after_o the_o make_n of_o matter_n which_o be_v a_o motion_n of_o recess_n from_o
the_o centre_n of_o the_o shine_a body_n next_o that_o a_o firmament_n which_o divide_v between_o the_o water_n or_o the_o fluid_n of_o the_o one_o and_o the_o fluid_n of_o another_o part_n of_o the_o world_n and_o in_o the_o three_o place_n the_o collection_n of_o particular_a fluid_n to_o one_o centre_n as_o the_o centre_n of_o the_o earth_n and_o last_o out_o of_o that_o collection_n of_o fluid_n appear_v the_o dry_a and_o solid_a land_n so_o i_o conceive_v the_o most_o proper_a way_n of_o speculate_v on_o these_o great_a production_n of_o the_o omnipotent_a creator_n may_v be_v to_o begin_v with_o the_o consideration_n of_o light_n or_o the_o motion_n of_o recess_n from_o the_o centre_n of_o a_o body_n next_o with_o the_o consideration_n of_o the_o cause_n of_o the_o separate_n of_o fluid_a from_o fluid_fw-la as_o aether_n from_o aether_n as_o i_o may_v so_o call_v differ_v aether_n because_o we_o have_v not_o yet_o distinct_a name_n in_o use_n and_o the_o reason_n of_o their_o conglobation_n the_o aether_n from_o the_o air_n the_o air_n from_o the_o water_n the_o water_n from_o quicksilver_n oil_n or_o other_o fluid_a three_o the_o cause_n of_o the_o conglobate_v property_n of_o each_o of_o these_o fluid_n when_o separate_v how_o they_o accept_v and_o embrace_v homogenea_n and_o reject_v or_o expel_v heterogenea_n and_o four_a how_o they_o condense_a and_o settle_v together_o and_o produce_v a_o solid_a body_n whence_o proceed_v the_o confirmation_n of_o attraction_n or_o gravitation_n etc._n etc._n but_o to_o digress_v no_o further_o but_o conclude_v this_o part_n of_o enquiry_n in_o short_a i_o suppose_v the_o nucleus_n or_o star_n of_o the_o comet_n may_v be_v much_o of_o the_o like_a nature_n with_o the_o central_a part_n of_o the_o earth_n moon_n mars_n jupiter_n saturn_n or_o other_o planet_n but_o much_o impair_v in_o its_o attractive_a or_o gravitating_a power_n next_o that_o the_o coma_n or_o hazy_a cloud_n about_o it_o may_v be_v of_o the_o nature_n of_o the_o atmosphere_n or_o air_n about_o the_o earth_n or_o the_o smoke_n or_o steam_n about_o a_o heat_a or_o burn_a body_n before_o they_o be_v quite_o kindle_v convert_v into_o flame_n or_o dissolve_v into_o the_o ambient_fw-la air._n three_o that_o the_o tail_n or_o blaze_n be_v much_o of_o the_o nature_n of_o the_o part_n of_o flame_n though_o with_o those_o difference_n i_o conceive_v that_o the_o part_n of_o these_o steam_n be_v not_o so_o close_o together_o as_o be_v those_o of_o smoke_n nor_o do_v the_o motion_n of_o they_o though_o much_o swift_a upward_o than_o that_o of_o our_o flame_n serve_v to_o make_v they_o appear_v a_o shine_a line_n but_o be_v at_o that_o distance_n they_o appear_v much_o slow_a to_o the_o eye_n and_o so_o discontinue_v the_o appearance_n whence_o every_o shine_a particle_n appear_v only_o a_o shine_a point_n though_o in_o the_o part_n of_o flame_n where_o notwithstanding_o the_o motion_n be_v much_o flower_n yet_o be_v near_o and_o so_o vary_v the_o position_n to_o the_o eye_n much_o quick_a each_o of_o the_o shine_a part_n make_v a_o appearance_n of_o a_o line_n of_o light_n and_o all_o of_o they_o pass_v pretty_a near_o together_o make_v the_o appearance_n of_o a_o continue_a fluid_a flame_n though_o that_o indeed_o be_v nothing_o but_o a_o great_a number_n of_o single_a parcel_n of_o the_o burn_a body_n raise_v up_o in_o the_o particle_n of_o smoke_n this_o will_v appear_v evident_a if_o we_o consider_v the_o appearance_n easy_o to_o be_v take_v notice_n of_o in_o light_n for_o it_o be_v obvious_a from_o multitude_n of_o experiment_n that_o any_o shine_a body_n as_o a_o candle_n or_o brand_n end_v be_v move_v very_o quick_a make_v the_o same_o impression_n on_o the_o eye_n that_o a_o line_n of_o light_n do_v stand_v still_o and_o as_o obvious_a also_o that_o any_o very_a light_a body_n encompass_v with_o a_o dark_a medium_n appear_v to_o the_o eye_n under_o a_o angle_n big_a than_o real_o it_o be_v and_o a_o dark_a body_n encompass_v with_o a_o light_a medium_n much_o less_o this_o any_o one_o may_v present_o find_v if_o he_o make_v a_o small_a hole_n through_o a_o thin_a plate_n of_o metal_n and_o hold_v it_o first_o between_o the_o light_n and_o the_o eye_n and_o so_o see_v the_o light_n appear_v through_o it_o and_o then_o place_v it_o so_o as_o there_o be_v nothing_o but_o darkness_n appear_v through_o the_o say_a hole_n for_o he_o will_v plain_o perceive_v that_o the_o same_o hole_n will_v appear_v much_o big_a in_o the_o former_a position_n than_o in_o the_o latter_a upon_o this_o account_n indeed_o each_o of_o the_o shine_a part_n of_o the_o comet_n seem_v to_o fill_v and_o occupy_v a_o much_o great_a space_n than_o real_o it_o do_v and_o so_o as_o it_o be_v observable_a in_o the_o milky_a way_n a_o great_a number_n of_o these_o small_a shine_a body_n though_o disperse_v at_o a_o pretty_a distance_n one_o from_o another_o yet_o by_o reason_n of_o the_o imperceptibleness_n of_o each_o of_o they_o they_o all_o seem_v to_o coalesce_v into_o a_o stream_n or_o blaze_n of_o light_n the_o brightness_n of_o which_o be_v yet_o far_o augment_v by_o a_o clear_a and_o unenlightened_a air_n and_o by_o such_o a_o part_n of_o the_o heaven_n wherein_o there_o appear_v few_o of_o the_o star_n whether_o they_o be_v great_a or_o lesser_a to_o the_o query_n of_o what_o magnitude_n the_o body_n coma_n and_o blaze_n of_o comet_n may_v be_v no_o answer_n can_v be_v give_v until_o another_o question_n be_v first_o answer_v and_o that_o be_v what_o be_v the_o place_n of_o comet_n and_o what_o be_v their_o distance_n from_o the_o earth_n it_o be_v the_o opinion_n of_o most_o modern_a writer_n before_o tycho_n brahe_n and_o kepler_n i_o know_v divers_a of_o the_o ancient_n think_v otherwise_o that_o comet_n be_v sublunary_a meteor_n draw_v up_o into_o the_o high_a region_n of_o the_o air_n and_o there_o set_v on_o fire_n and_o so_o continue_v burn_v till_o the_o meteor_n be_v consume_v and_o as_o the_o matter_n increase_v or_o waste_v so_o do_v the_o appearance_n of_o the_o comet_n but_o this_o noble_a dane_n and_o several_a other_o about_o that_o time_n find_v by_o accurate_a observation_n make_v that_o its_o parallax_n be_v less_o than_o that_o of_o the_o moon_n and_o consequent_o that_o it_o be_v far_o distant_a from_o the_o earth_n that_o it_o must_v be_v a_o body_n of_o another_o magnitude_n and_o nature_n than_o most_o before_o that_o time_n have_v imagine_v and_o therefore_o that_o it_o ought_v to_o be_v otherwise_o think_v of_o than_o the_o generality_n of_o mankind_n believe_v concern_v it_o many_o have_v be_v the_o attempt_n of_o former_a writer_n concern_v they_o to_o find_v out_o their_o parallax_n and_o whether_o from_o their_o unaccurate_a instrument_n or_o from_o their_o less_o skill_n and_o diligence_n in_o use_v they_o or_o from_o a_o imagination_n of_o the_o solidity_n and_o impenetrability_n of_o the_o celestial_a orb_n or_o from_o error_n in_o their_o calculation_n or_o from_o compare_v observation_n make_v at_o distant_a place_n one_o or_o both_o whereof_o be_v unaccurate_a or_o from_o a_o prepossession_n of_o tradition_n or_o common_a fame_n or_o from_o what_o other_o cause_n soever_o it_o be_v be_v uncertain_a but_o it_o be_v general_o conclude_v by_o they_o that_o all_o comet_n be_v sublunary_a meteor_n and_o there_o be_v not_o even_o at_o this_o day_n want_v some_o of_o the_o same_o opinion_n though_o for_o what_o reason_n i_o know_v not_o it_o will_v be_v hard_a to_o convince_v some_o of_o these_o that_o the_o opinion_n they_o have_v hitherto_o receive_v for_o good_a be_v not_o so_o because_o they_o will_v hardly_o give_v themselves_o the_o trouble_n of_o examine_v strict_o into_o the_o matter_n and_o to_o understand_v the_o nature_n of_o parallax_n and_o how_o significant_a they_o be_v in_o determine_v the_o distance_n of_o body_n from_o the_o surface_n of_o the_o earth_n to_o certain_a degree_n thereof_o beyond_o which_o by_o reason_n of_o the_o imperfection_n in_o instrument_n and_o observation_n and_o the_o exceed_a niceness_n and_o curiosity_n necessary_a they_o signify_v very_o little_a it_o be_v not_o my_o present_a design_n to_o explain_v what_o parallax_n be_v that_o i_o will_v suppose_v my_o reader_n to_o understand_v otherwise_o there_o can_v be_v no_o reason_n show_v he_o to_o convince_v he_o that_o it_o be_v possible_a to_o prove_v that_o this_o or_o that_o comet_n be_v not_o near_a than_o so_o many_o semidiameter_n of_o the_o earth_n nor_o far_o off_o than_o so_o many_o there_o be_v then_o two_o way_n by_o which_o we_o may_v come_v to_o some_o certainty_n of_o what_o distance_n a_o comet_n be_v and_o those_o be_v first_o the_o parallax_n of_o its_o diurnal_a motion_n or_o its_o parallax_n cause_v by_o the_o diurnal_a motion_n of_o the_o earth_n and_o
be_v take_v up_o into_o it_o and_o keep_v suspend_v therein_o though_o the_o part_n of_o the_o gold_n be_v fifteen_o time_n heavy_a than_o the_o part_n of_o the_o aqua_fw-la regis_fw-la so_o pit-coal_n though_o very_o heavy_a be_v yet_o take_v up_o into_o the_o air_n and_o keep_v suspend_v therein_o though_o it_o will_v be_v find_v to_o be_v some_o thousand_o of_o time_n more_o ponderous_a than_o the_o menstruum_fw-la of_o the_o air_n that_o keep_v it_o suspend_v many_o reason_n i_o can_v produce_v to_o show_v the_o great_a power_n of_o the_o aether_n and_o the_o universality_n of_o its_o activity_n almost_o in_o all_o sensible_a motion_n but_o reserve_v they_o for_o another_o discourse_n hereafter_o i_o shall_v at_o present_a only_o mention_v those_o supposition_n which_o seem_v to_o have_v the_o great_a difficulty_n in_o this_o theory_n viz._n how_o the_o dissolution_n of_o the_o part_n of_o the_o star_n by_o the_o encompass_v aether_n shall_v cause_v light_n and_o second_o how_o it_o shall_v cause_v a_o actual_a levitation_n of_o the_o dissolve_v particle_n upward_o for_o the_o explication_n of_o these_o two_o difficulty_n i_o must_v at_o present_a crave_v favour_n to_o explain_v they_o by_o example_n take_v from_o operation_n of_o nature_n in_o the_o atmosphere_n wherein_o we_o live_v very_o similar_v and_o analogous_a to_o they_o first_o for_o the_o production_n of_o light_n we_o find_v that_o the_o air_n encompass_v the_o steam_n of_o body_n prepare_v by_o heat_n or_o otherwise_o and_o make_v fit_a for_o dissolution_n do_v so_o operate_v upon_o they_o as_o to_o make_v they_o fly_v and_o part_v asunder_o with_o a_o very_a impetuous_a motion_n insomuch_o that_o the_o small_a particle_n or_o atom_n of_o the_o dissolve_a body_n do_v not_o only_o leave_v one_o another_o but_o depart_v and_o dart_v out_o with_o so_o great_a a_o impetuosity_n as_o to_o drive_v off_o all_o the_o encompass_v air_n from_o their_o centre_n from_o whence_o they_o fly_v and_o this_o i_o take_v to_o be_v the_o cause_n not_o only_o of_o their_o light_n but_o also_o of_o their_o levity_n upward_o this_o may_v be_v see_v very_o plain_o by_o the_o small_a part_n of_o crackle_v char-coal_n which_o upon_o the_o blow_v they_o with_o bellows_o and_o so_o crowd_v a_o great_a quantity_n of_o the_o fresh_a menstruum_fw-la on_o they_o fly_v and_o dart_v asunder_o with_o great_a celerity_n and_o noise_n but_o be_v abundant_o more_o evident_a in_o the_o kindle_v of_o gunpowder_n where_o the_o impetuosity_n be_v so_o very_o great_a as_o to_o drive_v away_o not_o only_o all_o the_o encompass_v air_n but_o all_o other_o body_n though_o never_o so_o solid_a that_o hinder_v its_o expansion_n in_o the_o perform_n of_o which_o operation_n the_o aether_n have_v a_o great_a share_n as_o i_o may_v hereafter_o show_v it_o be_v very_o probable_a that_o the_o aether_n in_o the_o same_o manner_n dissolve_v the_o particle_n of_o the_o star_n cause_v the_o atom_n thereof_o to_o fly_v asunder_o with_o so_o great_a a_o impetuosity_n as_o to_o leave_v a_o vacuity_n even_o of_o the_o part_n of_o the_o aether_n which_o fly_v asunder_o do_v not_o only_a cause_n light_n by_o impress_v on_o the_o aether_n a_o stroke_n or_o pulse_n which_o propagate_v every_o way_n in_o orbem_fw-la but_o make_v such_o a_o agitation_n of_o the_o the_o aether_n as_o cause_v a_o rarefaction_n in_o the_o part_n thereof_o whilst_o the_o part_n that_o be_v once_o actual_o separate_v by_o continual_a rebound_v one_o against_o another_o before_o they_o come_v to_o be_v at_o rest_n and_o quiet_o to_o touch_v each_o other_o prolong_v that_o first_o separation_n or_o vacuity_n between_o they_o this_o explication_n though_o it_o be_v somewhat_o difficult_a yet_o i_o hope_v it_o be_v intelligible_a and_o may_v be_v with_o probability_n enough_o suppose_v to_o be_v the_o true_a cause_n of_o the_o appearance_n whilst_o there_o be_v nothing_o therein_o suppose_v which_o be_v not_o manifest_o the_o method_n of_o nature_n in_o other_o operation_n and_o though_o the_o supposition_n even_o of_o the_o aether_n may_v seem_v to_o be_v a_o chimaera_n and_o groundless_a yet_o have_v i_o now_o time_n i_o can_v by_o many_o very_a sensible_a and_o undeniable_a experiment_n prove_v the_o existence_n and_o reality_n thereof_o and_o that_o it_o do_v actual_o produce_v not_o only_o as_o sensible_a effect_n as_o these_o i_o have_v name_v but_o very_o much_o the_o same_o and_o many_o other_o much_o more_o cosiderable_a which_o by_o philosopher_n have_v hitherto_o be_v ascribe_v to_o quite_o different_a cause_n have_v i_o be_v able_a to_o have_v make_v some_o other_o observation_n which_o i_o design_v if_o i_o have_v have_v the_o opportunity_n of_o see_v it_o some_o of_o the_o succeed_a night_n i_o shall_v have_v hope_v to_o have_v explain_v several_a other_o difficulty_n concern_v the_o nature_n of_o the_o body_n and_o blaze_n of_o comet_n but_o be_v therein_o prevent_v i_o must_v leave_v they_o till_o i_o can_v make_v some_o further_a observation_n on_o some_o comet_n that_o may_v hereafter_o appear_v in_o the_o mean_a time_n that_o what_o i_o have_v discourse_v concern_v the_o light_n of_o comet_n may_v not_o seem_v so_o altogether_o paradoxical_a and_o unintelligible_a as_o some_o may_v imagine_v i_o have_v here_o add_v a_o account_n of_o some_o trial_n and_o observation_n make_v on_o shine_a substance_n of_o nature_n exceed_o differ_v from_o those_o that_o be_v common_o to_o be_v meet_v withal_o and_o this_o i_o the_o rather_o do_v not_o only_o because_o it_o afford_v a_o instance_n of_o shine_v where_o there_o be_v no_o air_n but_o that_o hereby_o i_o may_v enlarge_v the_o limit_n of_o their_o imagination_n who_o shall_v consider_v of_o this_o subject_n for_o nothing_o be_v more_o apt_a to_o misguide_v our_o reason_n than_o a_o narrow_a and_o limit_a knowledge_n of_o cause_n we_o be_v not_o to_o conclude_v the_o body_n of_o a_o comet_n a_o sulphureous_a vapour_n exhale_v from_o the_o earth_n and_o kindle_v above_o because_o here_o be_v such_o vapour_n observe_v and_o such_o effect_n produce_v nor_o a_o collection_n of_o sun_n beam_n make_v by_o a_o lentiformed_a vapour_n after_o the_o manner_n of_o a_o burning-glass_n as_o some_o eminent_a writer_n have_v late_o do_v because_o some_o such_o appearance_n may_v be_v artificial_o produce_v in_o a_o smoky_a or_o thicken_a air_n since_o if_o we_o diligent_o inquire_v we_o may_v find_v that_o light_n which_o be_v the_o most_o sensible_a quality_n of_o comet_n that_o affect_v our_o sense_n may_v be_v and_o real_o be_v produce_v by_o very_a many_o and_o those_o very_a differ_a way_n in_o nitre_n and_o sulphur_n kindle_v each_o other_o by_o heat_n we_o have_v one_o way_n in_o a_o body_n burn_v in_o the_o air_n a_o second_o in_o a_o heat_a iron_n or_o glass_n a_o three_o in_o a_o piece_n of_o iron_n hammer_v till_o red_a hot_a a_o four_o in_o rot_a wood_n and_o decay_a fish_n a_o five_o in_o glow-worm_n scolopondras_n and_o other_o live_a worm_n and_o in_o the_o sweat_n and_o excrement_n of_o other_o live_a creature_n a_o six_o in_o a_o diamond_n rub_v a_o seven_o in_o dew_n ignes_fw-la fatui_fw-la etc._n etc._n a_o eight_o in_o sea-water_n a_o nine_o in_o the_o bononian_n stone_n and_o in_o the_o phosphorus_n baldwini_n which_o i_o take_v to_o be_v much_o of_o the_o same_o nature_n a_o ten_o in_o the_o phosphorus_n of_o mr._n kraft_n a_o eleven_o and_o possible_o whole_o differ_v from_o all_o these_o may_v be_v the_o light_n of_o the_o sun_n a_o twelve_o and_o that_o of_o the_o star_n may_v differ_v from_o that_o of_o sun_n and_o the_o comet_n may_v be_v differ_v from_o all_o the_o rest_n whether_o they_o be_v so_o or_o not_o the_o be_v acquaint_v with_o the_o several_a propriety_n of_o they_o will_v the_o better_o enable_v one_o to_o judge_n of_o what_o be_v pertinent_a to_o be_v observe_v in_o comet_n in_o order_n to_o find_v out_o which_o be_v concern_v the_o phaenomena_n of_o most_o of_o these_o shine_a body_n be_v very_o common_a and_o obvious_a and_o therefore_o needless_a to_o be_v add_v but_o that_o of_o the_o bononian_n stone_n prepare_v and_o that_o of_o the_o phosphorus_n baldwini_n late_o discover_v by_o mr._n baldwine_n be_v rare_a and_o hard_a to_o be_v get_v and_o the_o effect_n of_o they_o be_v whole_o differ_v from_o all_o the_o way_n i_o have_v yet_o meet_v with_o and_o will_v therefore_o prove_v experimenta_fw-la crucis_fw-la high_o instructive_a in_o the_o theory_n of_o light_n of_o which_o more_o hereafter_o as_o for_o the_o phosphoros_n fulgurans_fw-la of_o mr._n kraft_n more_o scarce_o and_o rare_a than_o the_o other_o it_o be_v whole_o differ_v from_o any_o of_o the_o rest_n and_o very_o strange_a and_o surprise_a at_o least_o it_o appear_v so_o to_o i_o who_o have_v the_o good_a fortune_n to_o be_v present_a at_o a_o good_a part_n of_o
seem_v more_o near_o to_o concern_v we_o and_o those_o be_v contain_v in_o the_o ensue_a discourse_n be_v a_o relation_n communicate_v to_o i_o in_o a_o letter_n by_o that_o ingenious_a and_o experience_a chirurgeon_n mr._n james_n young_a of_o plymouth_n in_o the_o begin_n of_o january_n last_o of_o the_o fatal_a symptom_n cause_v by_o a_o bullet_n swallow_v into_o the_o lung_n sir_n in_o the_o begin_n of_o april_n 1674._o one_o mr._n anthony_n williamson_n of_o liscard_v in_o cornwall_n age_a about_o 65_o year_n of_o a_o brisk_a firm_a habit_n become_v after_o a_o too_o liberal_a drink_n of_o cider_n afflict_v with_o the_o colic_n of_o which_o in_o four_o day_n he_o cure_v himself_o by_o swallow_v two_o musket_n bullet_n and_o receive_v some_o carminative_a clyster_n on_o the_o 12._o of_o the_o same_o month_n his_o pain_n return_v somewhat_o smart_a than_o before_o he_o attempt_v to_o swallow_v three_o pistol_n shoot_v and_o suppose_v it_o the_o easy_a way_n he_o lay_v on_o his_o back_n and_o throw_v they_o all_o at_o once_o into_o his_o throat_n where_o they_o choke_v have_v almost_o strangle_v he_o constrain_a he_o to_o vomit_v etc._n etc._n when_o they_o be_v pass_v down_o he_o become_v seize_v immediate_o with_o a_o violent_a cough_n whease_v pain_n in_o the_o left_a side_n of_o his_o breast_n a_o great_a noise_n in_o respiration_n more_o especial_o after_o a_o fit_a of_o cough_n for_o then_o his_o breast_n will_v hiss_v like_o the_o suck_n of_o a_o pump_n when_o the_o air_n descend_v through_o the_o box_n these_o accident_n so_o sudden_o occur_v without_o any_o manifest_a cause_n do_v much_o surprise_v he_o and_o the_o more_o because_o he_o be_v natural_o of_o a_o sound_a breast_n the_o colic_n be_v cure_v by_o clyster_n potion_n of_o manna_n ol_n amyg_fw-mi d._n etc._n etc._n and_o two_o of_o the_o shot_n be_v soon_o eject_v ex_fw-la ano_fw-la and_o maugre_o the_o other_o accident_n he_o become_v indifferent_o well_o and_o able_a to_o walk_v about_o house_n five_o or_o six_o week_n after_o this_o those_o symptom_n become_v more_o fierce_a depauper_v his_o spirit_n prostrate_v his_o appetite_n disquiet_v his_o sleep_n with_o dream_n a_o dyspnoea_fw-la and_o rutle_v violent_a cough_n a_o straitness_n and_o load_n in_o his_o breast_n keep_v he_o in_o bed_n extenuate_v his_o body_n which_o without_o help_n of_o milk_n clyster_n be_v costive_a he_o frequent_o faint_v with_o sweat_n and_o a_o tickle_a sleepiness_n in_o both_o leg_n under_o the_o tyranny_n of_o this_o legion_n of_o symptom_n our_o western_a apollo_n dr._n bidgood_n of_o exeter_n be_v consult_v who_o affirm_v they_o all_o to_o be_v cause_v by_o the_o remain_a bullet_n which_o pass_v through_o the_o larynx_n be_v fall_v into_o one_o of_o the_o branch_n of_o the_o trachea_n where_o it_o will_v abide_v in_o despite_n of_o any_o endeavour_n to_o eject_v it_o yet_o to_o alleviate_v the_o violence_n of_o the_o accident_n he_o direct_v to_o the_o use_n of_o emollient_a eclegma_n temperate_a cordial_n etc._n etc._n by_o help_n of_o which_o and_o some_o other_o propitious_a circumstance_n he_o not_o only_o recover_v his_o leg_n become_v able_a to_o walk_v and_o ride_v a_o small_a journey_n but_o also_o consummate_v marriage_n with_o a_o young_a woman_n of_o 25_o who_o afterward_o bring_v he_o two_o child_n whereof_o one_o be_v now_o alive_a and_o very_o lusty_a and_o be_v seven_o month_n go_v with_o a_o three_o when_o he_o die_v the_o more_o wonderful_a if_o the_o woman_n be_v just_a to_o he_o of_o which_o there_o appear_v no_o reason_n to_o doubt_v because_o a_o very_a little_a motion_n will_v so_o increase_v his_o difficulty_n of_o breathe_v as_o to_o make_v he_o faint_a after_o matrimony_n he_o have_v divers_a lucid_a interval_n at_o time_n will_v be_v very_o brisk_a and_o at_o other_o very_o languid_a and_o faint_a like_o a_o die_a man_n he_o continual_o expectorate_v sometime_o grumou_n coagulate_v blood_n otherwhiles_o very_o recent_a now_o purulent_a foetid_v matter_n then_o laudable_a pus_fw-la his_o natural_a aversion_n to_o medicine_n cause_v he_o to_o reject_v what_o be_v advise_v by_o dr._n bidgood_n dr._n lower_n dr._n sprage_n etc._n etc._n save_v a_o few_o of_o the_o more_o slight_a mixture_n and_o although_o sack_n have_v be_v former_o very_o familiar_a to_o he_o he_o be_v now_o force_v to_o shun_v it_o and_o all_o strong_a drink_n because_o they_o will_v infallible_o produce_v a_o cardialgia_n a_o pulsant_fw-la throb_v of_o the_o heart_n and_o labour_v in_o his_o breast_n the_o first_o of_o these_o perhaps_o proceed_v from_o his_o constitution_n which_o incline_v to_o choler_n but_o the_o latter_a undoubted_o from_o the_o effervescency_n and_o warm_a motion_n to_o which_o it_o enforce_v the_o blood_n which_o the_o obstruction_n and_o pressure_n the_o bullet_n occasion_v in_o the_o pneumatick_a organ_n can_v not_o peaceable_o admit_v of_o wherefore_o he_o resolute_o fix_v to_o small_a drink_n and_o shun_v as_o much_o as_o possible_a all_o evitable_a exercise_n save_v that_o of_o his_o hand_n which_o he_o frequent_o employ_v in_o make_v network_n in_o the_o year_n 1676._o he_o apply_v himself_o to_o our_o ingenious_a and_o learned_a countryman_n dr_n mayow_o of_o bath_n who_o agree_v with_o dr._n bidgood_n that_o the_o remain_a bullet_n lodging_n in_o the_o lung_n be_v the_o occasion_n of_o all_o those_o ill_a symptom_n under_o which_o he_o labour_v but_o seem_v to_o dissent_v from_o his_o presage_n by_o hope_v he_o may_v expectorate_v it_o to_o achieve_v which_o he_o direct_v to_o have_v the_o body_n suspend_v head_n downward_o and_o fume_n of_o storax_n benjamin_n etc._n etc._n to_o induce_v expulsive_a cough_n together_o with_o concussion_n of_o the_o body_n and_o all_o precede_v with_o a_o open_v course_n to_o relax_v and_o dilate_v the_o vessel_n of_o the_o breast_n all_o which_o be_v use_v to_o no_o purpose_n save_v to_o verify_v dr._n bidgoods_n prognostic_n that_o no_o efflation_n how_o violent_a soever_o will_v be_v able_a to_o extrude_v it_o and_o enhance_v the_o patient_n despair_n of_o be_v ever_o cure_v from_o which_o time_n he_o never_o attempt_v it_o so_o that_o those_o symptom_n before_o mention_v continue_v until_o the_o winter_n and_o then_o gain_v considerable_o on_o he_o especial_o the_o haemoptysis_n etc._n etc._n he_o languish_v till_o the_o nine_o of_o december_n last_o and_o then_o die_v the_o ten_o ditto_n assist_v by_o his_o son-in-law_n i_o open_v the_o thorax_n in_o presence_n of_o two_o other_o surgeon_n of_o the_o place_n together_o with_o divers_a person_n of_o quality_n who_o curiosity_n lead_v they_o to_o see_v the_o examination_n because_o the_o bullet_n be_v there_o be_v so_o much_o doubt_v by_o many_o and_o dispute_v as_o impossible_a by_o other_o in_o the_o disfection_n the_o follow_a particular_n be_v observable_a the_o body_n be_v extenuate_v and_o tabid_v the_o right_a lobe_n of_o the_o lung_n be_v replete_a sound_a and_o well_o colour_v the_o serum_n in_o the_o pericardium_n be_v almost_o all_o absume_v the_o heart_n strange_o shrivel_v and_o very_o small_a under_o the_o pericardium_n the_o body_n be_v supine_n we_o find_v a_o lump_n of_o coagulate_v blood_n as_o big_a as_o a_o pigeon_n egg_n near_o which_o lie_v also_o a_o substance_n shape_v like_o a_o obtuse_a head_a muscle_n have_v a_o tendon-like_a tail_n which_o insinuate_v to_o the_o pendant_fw-fr lobe_n its_o body_n be_v above_o a_o half_a inch_n thick_a it_o be_v other_o dimension_n and_o shape_n exact_o like_o that_o of_o the_o figure_n x_o of_o which_o a_o show_v the_o head_n or_o upper_a end_n b_o the_o tail_n which_o in_o draw_v out_o of_o the_o rot_a lung_n be_v also_o corrupt_v break_v asunder_o it_o be_v texture_n seem_v fibrous_a like_o that_o of_o the_o kidney_n be_v white_a one_o half_a way_n through_o the_o rest_n of_o a_o dark_a red_a it_o be_v very_o soft_a and_o plum_n have_v a_o firm_a smooth_a tegument_n and_o feel_v very_o much_o like_o a_o sheep_n kidney_n the_o left_a lobe_n of_o the_o lung_n be_v cadaverous_a and_o hollow_a by_o a_o abscess_n which_o have_v discharge_v near_o a_o pint_n of_o very_o foetid_v and_o purulent_a matter_n into_o that_o side_n of_o the_o trunk_n where_o it_o lay_v immure_v up_o by_o the_o adhesion_n of_o the_o lung_n on_o that_o side_n to_o the_o pleura_fw-la which_o with_o the_o diaphragima_fw-la as_o far_o as_o the_o matter_n extend_v be_v livid_v and_o erode_v we_o examine_v this_o rot_a part_n of_o the_o lung_n with_o what_o exactness_n and_o curiosity_n we_o be_v capable_a of_o amid_o such_o a_o crowd_n as_o be_v present_a and_o the_o more_o troublesome_a stench_n of_o the_o cadaver_n and_o find_v though_o the_o whole_a parenchyma_n be_v rot_v and_o no_o firm_a than_o coagulate_v blood_n with_o which_o it_o have_v very_o near_a resemblance_n yet_o the_o branch_n of_o the_o trachea_n continue_v