look_v back_o to_o the_o end_n that_o be_v from_o consultation_n it_o must_v needs_o be_v that_o see_v in_o sleep_n we_o lose_v all_o thought_n of_o the_o end_n our_o phantasm_n succeed_v one_o another_o not_o in_o that_o order_n which_o tend_v to_o any_o end_n but_o as_o it_o happen_v and_o in_o such_o manner_n as_o object_n present_v themselves_o to_o our_o eye_n when_o we_o look_v indifferent_o upon_o all_o thing_n before_o we_o and_o see_v they_o not_o because_o we_o will_v see_v they_o but_o because_o we_o do_v not_o shut_v our_o eye_n for_o than_o they_o appear_v to_o we_o without_o any_o order_n at_o all_o the_o second_o proceed_v from_o this_o that_o in_o the_o silence_n of_o sense_n there_o be_v no_o new_a motion_n from_o the_o object_n and_o therefore_o no_o new_a phantasm_n unless_o we_o call_v that_o new_a which_o be_v compound_v of_o old_a one_o as_o a_o chimaera_n a_o golden_a mountain_n and_o the_o like_a as_o for_o the_o three_o why_o a_o dream_n be_v sometime_o as_o it_o be_v the_o continuation_n of_o sense_n make_v up_o of_o break_a phantasm_n as_o in_o man_n distemper_v with_o sickness_n the_o reason_n be_v manifest_o this_o that_o in_o some_o of_o the_o organ_n sense_n remain_v and_o in_o other_o it_o fail_v but_o how_o some_o phantasm_n may_v be_v revive_v when_o all_o the_o exterior_a organ_n be_v benumb_v with_o sleep_n be_v not_o so_o easy_o show_v nevertheless_o that_o which_o have_v already_o be_v say_v contain_v the_o reason_n of_o this_o also_o for_o whatsoever_o strike_v the_o pia_fw-la mater_fw-la revive_v some_o of_o those_o phantasm_n that_o be_v still_o in_o motion_n in_o the_o brain_n and_o when_o any_o internal_a motion_n of_o the_o heart_n reach_v that_o membrane_n than_o the_o predominant_a motion_n in_o the_o brain_n make_v the_o phantasm_n now_o the_o motion_n of_o the_o heart_n be_v appetite_n and_o aversion_n of_o which_o i_o shall_v present_o speak_v further_o and_o as_o appetite_n and_o aversion_n be_v generate_v by_o phantasm_n so_o reciprocal_o phantasm_n be_v generate_v by_o appetite_n and_o aversion_n for_o example_n heat_v in_o the_o heart_n proceed_v from_o anger_n and_o fight_v and_o again_o from_o heat_n in_o the_o heart_n whatsoever_o be_v the_o cause_n of_o it_o be_v generate_v anger_n and_o the_o image_n of_o a_o enemy_n in_o sleep_n and_o as_o love_n and_o beauty_n stir_v up_o heat_n in_o certain_a organ_n so_o heat_v in_o the_o same_o organ_n from_o whatsoever_o it_o proceed_v often_o cause_v desire_n and_o the_o image_n of_o a_o unresisted_a beauty_n last_o cold_a do_v in_o the_o same_o manner_n generate_v fear_n in_o those_o that_o sleep_n and_o cause_v they_o to_o dream_v of_o ghost_n and_o to_o have_v phantasm_n of_o horror_n and_o danger_n as_o fear_v also_o cause_v cold_a in_o those_o that_o wake_v so_o reciprocal_a be_v the_o motion_n of_o the_o heart_n and_o brain_n the_o four_o namely_o that_o the_o thing_n we_o seem_v to_o see_v and_o feel_v in_o sleep_n be_v as_o clear_a as_o in_o sense_n itself_o proceed_v from_o two_o cause_n one_o that_o have_v then_o no_o sense_n of_o thing_n without_o we_o that_o internal_a motion_n which_o make_v the_o phantasm_n in_o the_o absence_n of_o all_o other_o impression_n be_v predominant_a and_o the_o other_o that_o the_o part_n of_o our_o phantasm_n which_o be_v decay_v and_o wear_v out_o by_o time_n be_v make_v up_o with_o other_o fictitious_a part_n to_o conclude_v when_o we_o dream_v we_o do_v not_o wonder_v at_o strange_a place_n and_o the_o appearance_n of_o thing_n unknown_a to_o we_o because_o admiration_n require_v that_o the_o thing_n appear_v be_v new_a and_o unusual_a which_o can_v happen_v to_o none_o but_o those_o that_o remember_v former_a appearance_n whereas_o in_o sleep_n all_o thing_n appear_v as_o present_v but_o it_o be_v here_o to_o be_v observe_v that_o certain_a dream_n especial_o such_o as_o some_o man_n have_v when_o they_o be_v between_o sleep_v and_o wake_v and_o such_o as_o happen_v to_o those_o that_o have_v no_o knowledge_n of_o the_o nature_n of_o dream_n and_o be_v with_o all_o superstitious_a be_v not_o heretofore_o nor_o be_v now_o account_v dream_n for_o the_o apparition_n man_n think_v they_o see_v and_o the_o voice_n they_o think_v they_o hear_v in_o sleep_n be_v not_o believe_v to_o be_v phantasm_n but_o thing_n subsist_v of_o themselves_o and_o object_n without_o those_o that_o dream_v for_o to_o some_o man_n as_o well_o sleep_v as_o wake_v but_o especial_o to_o guilty_a man_n and_o in_o the_o night_n and_o in_o hallow_a place_n fear_v alone_o help_v a_o little_a with_o the_o story_n of_o such_o apparition_n have_v raise_v in_o their_o mind_n terrible_a phantasm_n which_o have_v be_v and_o be_v still_o deceitful_o receive_v for_o thing_n real_o true_a under_o the_o name_n of_o ghost_n and_o incorporeal_a substance_n 10_o in_o most_o live_a creature_n there_o be_v observe_v five_o kind_n of_o sense_n which_o be_v distinguish_v by_o their_o organ_n and_o by_o their_o different_a kind_n of_o phantasm_n namely_o sight_n hear_v smell_v taste_n and_o touch_v and_o these_o have_v their_o organ_n partly_o peculiar_a to_o each_o of_o they_o several_o and_o partly_o common_a to_o they_o all_o the_o organ_n of_o sight_n be_v partly_o animate_v and_o partly_o inanimate_a the_o inanimate_a part_n be_v the_o three_o humour_n namely_o the_o watery_a humour_n which_o by_o the_o interposition_n of_o the_o membrane_n call_v uâ—ea_n the_o perforation_n whereof_o be_v call_v the_o apple_n of_o the_o eye_n be_v contain_v on_o one_o side_n by_o the_o first_o concave_a superficies_n of_o the_o eye_n and_o on_o the_o other_o side_n by_o the_o ciliary_a process_n and_o the_o coat_n of_o the_o crystalline_a humour_n the_o crystalline_a which_o hang_v in_o the_o midst_n between_o the_o ciliary_a process_n and_o be_v almost_o of_o spherical_a figure_n and_o of_o a_o thick_a consistence_n be_v enclose_v on_o all_o side_n with_o its_o own_o transparent_a coat_n and_o the_o vitreous_a or_o glassy_a humour_n which_o fill_v all_o the_o rest_n of_o the_o cavity_n of_o the_o eye_n and_o be_v somewhat_o thick_a than_o the_o watery_a humour_n but_o thin_a than_o the_o crystalline_a the_o animate_v part_n of_o the_o organ_n be_v first_o the_o membrane_n choroeides_n which_o be_v a_o part_n of_o the_o pia_fw-la mater_fw-la save_v that_o it_o be_v cover_v with_o a_o coat_n derive_v from_o the_o marrow_n of_o the_o optic_a nerve_n which_o be_v call_v the_o retina_fw-la and_o this_o choroeides_n see_v it_o be_v part_n of_o the_o pia_fw-la mater_fw-la be_v continue_v to_o the_o begin_n of_o the_o medulla_n spinalis_fw-la within_o the_o scull_n in_o which_o all_o the_o nerve_n which_o be_v within_o the_o head_n have_v their_o root_n wherefore_o all_o the_o animal_n spirit_n that_o the_o nerve_n receive_v enter_v into_o they_o there_o for_o it_o be_v not_o imaginable_a that_o they_o can_v enter_v into_o they_o any_o where_o else_o see_v therefore_o sense_n be_v nothing_o else_o but_o the_o action_n of_o object_n propagate_v to_o the_o further_a part_n of_o the_o organ_n and_o see_v also_o that_o animal_n spirit_n be_v nothing_o but_o vital_a spirit_n purify_v by_o the_o hart_n and_o carry_v from_o it_o by_o the_o artery_n it_o follow_v necessary_o that_o the_o action_n be_v derive_v from_o the_o heart_n by_o some_o of_o the_o artery_n to_o the_o root_n of_o the_o nerve_n which_o be_v in_o the_o head_n whether_o those_o artery_n be_v the_o plexus_fw-la retiformis_fw-la or_o whether_o they_o be_v other_o artery_n which_o be_v insert_v into_o the_o substance_n of_o the_o brain_n and_o therefore_o those_o artery_n be_v the_o compliment_n or_o the_o remay_v part_n of_o the_o whole_a organ_n of_o sight_n and_o this_o last_o part_n be_v a_o common_a organ_n to_o all_o the_o sense_n whereas_o that_o which_o reach_v from_o the_o eye_n to_o the_o root_n of_o the_o nerve_n be_v proper_a only_a to_o sight_n the_o proper_a organ_n of_o hear_v be_v the_o tympanum_fw-la of_o the_o ear_n and_o its_o own_o nerve_n from_o which_o to_o the_o heart_n the_o organ_n be_v common_a so_o the_o proper_a organ_n of_o smell_n &_o taste_n be_v nervous_a membrane_n in_o the_o palate_n and_o tongue_n for_o the_o taste_n and_o in_o the_o nostril_n for_o the_o smell_n and_o from_o the_o root_n of_o those_o nerve_n to_o the_o heart_n all_o be_v common_a last_o â—he_v proper_a organ_n of_o touch_n be_v nerve_n and_o membrane_n disperse_v through_o the_o whole_a body_n which_o membrane_n be_v derive_v from_o the_o root_n of_o the_o nerve_n and_o all_o thing_n else_o belong_v alike_o to_o all_o the_o sense_n seem_v to_o be_v administer_v by_o the_o artery_n and_o not_o by_o the_o nerve_n the_o proper_a phantasm_n of_o sight_n be_v light_a and_o under_o this_o name_n of_o light_n colour_v also_o which_o be_v
distance_n and_o the_o magnitude_n and_o splendour_n be_v see_v in_o more_o line_n and_o distance_n than_o one_o as_o it_o be_v in_o reflection_n or_o refraction_n than_o neither_o that_o splendour_n nor_o apparent_a magnitude_n be_v in_o the_o sun_n itself_o and_o therefore_o the_o body_n of_o the_o sun_n can_v be_v the_o subject_a of_o that_o splendour_n and_o magnitude_n and_o for_o the_o same_o reason_n the_o air_n and_o other_o part_n will_v be_v reject_v till_o at_o last_o nothing_o remain_v which_o can_v be_v the_o subject_a of_o that_o splendour_n and_o magnitude_n but_o the_o sentient_n itself_o and_o this_o method_n in_o regard_n the_o subject_n be_v divide_v into_o part_n be_v analitycall_a and_o in_o regard_n the_o property_n both_o of_o the_o subject_a and_o accident_n be_v compare_v with_o the_o accident_n concern_v who_o subject_n the_o enquiry_n be_v make_v it_o be_v syntheticall_a 10_o but_o when_o we_o seek_v after_o the_o cause_n of_o any_o propound_a effect_n we_o must_v in_o the_o first_o place_n get_v into_o our_o mind_n a_o exact_a notion_n or_o idea_n of_o that_o which_o we_o call_v cause_n namely_o that_o a_o cause_n be_v the_o sum_n or_o aggregate_v of_o all_o such_o accident_n both_o in_o the_o agent_n and_o the_o patient_n as_o concur_v to_o the_o produce_v of_o the_o effect_v propound_v all_o which_o exist_v together_o it_o can_v be_v understand_v but_o that_o the_o effect_n exi_v with_o they_o or_o that_o it_o can_v possible_o exist_v if_o any_o one_o of_o they_o be_v absent_a this_o be_v know_v in_o the_o next_o place_n we_o must_v examine_v single_o every_o accident_n that_o accompany_v or_o praecede_v the_o effect_n as_o far_o forth_o as_o it_o seem_v to_o conduce_v in_o any_o manner_n to_o the_o production_n of_o the_o same_o and_o see_v whether_o the_o propound_a effect_n may_v be_v conceive_v to_o exist_v without_o the_o existence_n of_o any_o of_o those_o accident_n and_o by_o this_o mean_n separate_v such_o accident_n as_o do_v not_o concur_v from_o such_o as_o concur_v to_o produce_v the_o say_a effect_n which_o be_v do_v we_o be_v to_o put_v together_o the_o concur_v accident_n and_o consider_v whether_o we_o can_v possible_o conceive_v that_o when_o these_o be_v all_o present_a the_o effect_v propound_v will_v not_o follow_v and_o if_o it_o be_v evident_a that_o the_o effect_n will_v follow_v then_o that_o aggregate_v of_o accident_n be_v the_o entire_a cause_n otherwise_o not_o but_o we_o must_v still_o search_v out_o and_o put_v together_o other_o accident_n for_o example_n if_o the_o cause_n of_o light_n be_v propound_v to_o be_v seek_v out_o first_o we_o examine_v thing_n without_o we_o and_o find_v that_o whensoever_o light_n appear_v there_o be_v some_o principal_a object_n as_o it_o be_v the_o fountain_n of_o light_n without_o which_o we_o can_v have_v any_o perception_n of_o light_n and_o therefore_o the_o concurrence_n of_o that_o object_n be_v necessary_a to_o the_o generation_n of_o light_n next_o we_o consider_v the_o medium_fw-la and_o find_v that_o unless_o it_o be_v dispose_v in_o a_o certain_a manner_n namely_o that_o it_o be_v transparent_a though_o the_o object_n remain_v the_o same_o yet_o the_o effect_n will_v not_o follow_v and_o therefore_o the_o concurrence_n of_o transparency_n be_v also_o necessary_a to_o the_o generation_n of_o light_n three_o we_o observe_v our_o own_o body_n and_o find_v that_o by_o the_o indisposition_n of_o the_o eye_n the_o brain_n the_o nerve_n and_o the_o heart_n that_o be_v by_o obstruction_n stupidity_n and_o debility_n we_o be_v deprive_v of_o light_n so_o that_o a_o fit_a disposition_n of_o the_o organ_n to_o receive_v impression_n from_o without_o be_v likewise_o a_o necessary_a part_n of_o the_o cause_n of_o light_n again_o of_o all_o the_o accident_n inhaerent_a in_o the_o object_n there_o be_v none_o that_o can_v conduce_v to_o the_o effect_n of_o light_n but_o only_a action_n or_o a_o certain_a motion_n which_o can_v be_v conceive_v to_o be_v want_v whensoever_o the_o effect_n be_v present_a for_o that_o any_o thing_n may_v shine_v it_o be_v not_o requisite_a that_o it_o be_v of_o such_o or_o such_o magnitude_n or_o figure_n or_o that_o the_o whole_a body_n of_o it_o be_v move_v out_o of_o the_o place_n it_o be_v in_o unless_o it_o may_v perhaps_o be_v say_v that_o in_o the_o sun_n or_o other_o body_n that_o which_o cause_v light_n be_v the_o light_n it_o have_v in_o itself_o which_o yet_o be_v but_o a_o trifle_a exception_n see_v nothing_o be_v mean_v thereby_o but_o the_o cause_n of_o light_n as_o if_o any_o man_n shall_v say_v that_o the_o cause_n of_o light_n be_v that_o in_o the_o sun_n which_o produce_v it_o it_o remain_v therefore_o that_o the_o action_n by_o which_o light_n be_v generate_v be_v motion_n only_o in_o the_o part_n of_o the_o object_n which_o be_v understand_v we_o may_v easy_o conceive_v what_o it_o be_v the_o medium_fw-la contribute_v namely_o the_o continuation_n of_o that_o motion_n to_o the_o eye_n and_o last_o what_o the_o eye_n and_o the_o rest_n of_o the_o organ_n of_o the_o sentient_n contribute_v namely_o the_o continuation_n of_o the_o same_o motion_n to_o the_o last_o organ_n of_o sense_n the_o heart_n and_o in_o this_o manner_n the_o cause_n of_o light_n may_v be_v make_v up_o of_o motion_n continue_v from_o the_o original_a of_o the_o same_o motion_n to_o the_o original_a of_o vital_a motion_n light_n be_v nothing_o but_o the_o alteration_n of_o vital_a motion_n make_v by_o the_o impression_n upon_o it_o of_o motion_n continue_v from_o the_o object_n but_o i_o give_v this_o only_a for_o a_o example_n for_o i_o shall_v speak_v more_o at_o large_a of_o light_n and_o the_o generation_n of_o it_o in_o its_o proper_a place_n in_o the_o mean_a time_n it_o be_v manifest_a that_o in_o the_o search_n out_o of_o cause_n there_o be_v need_v partly_o of_o the_o analyticall_a and_o partly_o of_o the_o syntheticall_a method_n of_o the_o analyticall_a to_o conceive_v how_o circumstance_n conduce_v several_o to_o the_o production_n of_o effect_n and_o of_o the_o syntheticall_a for_o the_o add_v together_o and_o compound_v of_o what_o they_o can_v effect_v single_o by_o themselves_o and_o thus_o much_o may_v serve_v for_o the_o method_n of_o invention_n it_o remain_v that_o i_o speak_v of_o the_o method_n of_o teach_v that_o be_v of_o demonstration_n and_o of_o the_o mean_n by_o which_o we_o demonstrate_v 11_o in_o the_o method_n of_o invention_n the_o use_n of_o word_n consist_v in_o this_o that_o they_o may_v serve_v for_o mark_n by_o which_o whatsoever_o we_o have_v find_v out_o may_v be_v recall_v to_o memory_n for_o without_o this_o all_o our_o invention_n perish_v nor_o will_v it_o be_v possible_a for_o we_o to_o go_v on_o from_o principle_n beyond_o a_o syllogism_n or_o two_o by_o reason_n of_o the_o weakness_n of_o memory_n for_o example_n if_o any_o man_n by_o consider_v a_o triangle_n set_v before_o he_o shall_v find_v that_o all_o its_o angle_n together_o take_v be_v equal_a to_o two_o right_a angle_n and_o that_o by_o think_v of_o the_o same_o tacit_o without_o any_o use_n of_o word_n either_o understand_v or_o express_v and_o it_o shall_v happen_v afterward_o that_o another_o triangle_n unlike_o the_o former_a or_o the_o same_o in_o different_a situation_n shall_v be_v offer_v to_o his_o consideration_n he_o will_v not_o know_v ready_o whether_o the_o same_o property_n be_v in_o this_o last_o or_o no_o but_o will_v be_v force_v as_o often_o as_o a_o different_a triangle_n be_v bring_v before_o he_o and_o the_o difference_n of_o triangle_n be_v infinite_a to_o begin_v his_o contemplation_n anew_o which_o he_o will_v have_v no_o need_n to_o do_v if_o he_o have_v the_o use_n of_o name_n for_o every_o universal_a name_n denote_v the_o conception_n we_o have_v of_o infinite_a singular_a thing_n nevertheless_o as_o i_o say_v above_o they_o serve_v as_o mark_v for_o the_o help_n of_o our_o memory_n whereby_o we_o register_v to_o ourselves_o our_o own_o invention_n but_o not_o as_o sign_n by_o which_o we_o declare_v the_o same_o to_o other_o so_o that_o a_o man_n may_v be_v a_o philosopher_n alone_o by_o himself_o without_o any_o master_n adam_n have_v this_o capacity_n but_o to_o teach_v that_o be_v to_o demonstrate_v suppose_v two_o at_o the_o least_o and_o syllogistical_a speech_n 12_o and_o see_v teach_v be_v nothing_o but_o lead_v the_o mind_n of_o he_o we_o teach_v to_o the_o knowledge_n of_o our_o invention_n in_o that_o track_n by_o which_o we_o attain_v the_o same_o with_o our_o own_o mind_n therefore_o the_o same_o method_n that_o serve_v for_o our_o invention_n will_v serve_v also_o for_o demonstration_n to_o other_o save_v that_o we_o omit_v the_o first_o part_n of_o method_n which_o proceed_v from_o the_o sense_n of_o thing_n to_o universal_a principle_n which_o
of_o inclination_n a_o b_o c_o be_v a_o angle_n of_o 45_o degree_n let_v c_o b_o be_v produce_v to_o the_o circumference_n in_o d_o &_o let_v c_o e_o the_o sine_z of_o the_o angle_n â—_o b_o c_o be_v draw_v to_o which_o let_v b_o f_o be_v take_v equal_a in_o the_o separate_a line_n b_o g._n b_o c_o e_o f_o will_n therefore_o be_v a_o parallelogram_n &_o f_o e_o &_o b_o c_o that_o be_v f_o e_o and_o b_o g_o equal_a let_v agnostus_n be_v draw_v namely_o the_o diagonal_a of_o the_o square_n who_o side_n be_v b_o g_z and_o it_o will_v be_v as_o a_o g_z to_z e_z f_o so_o b_o g_z to_z b_o f_o &_o so_o by_o supposition_n the_o density_n of_o the_o medium_fw-la in_o which_o c_z be_v to_o the_o density_n of_o the_o medium_fw-la in_o which_o d_o be_v and_o so_o also_o the_o sine_fw-la of_o the_o angle_n refract_v to_o the_o sine_fw-la of_o the_o angle_n of_o inclination_n draw_v therefore_o f_o d_o &_o from_o d_o the_o line_n d_o h_n perpendicular_a to_o a_o b_o produce_v dh_n will_v be_v the_o sine_fw-la of_o the_o angle_n of_o inclination_n and_o see_v the_o sine_fw-la of_o the_o angle_n refract_v be_v to_o the_o sine_fw-la of_o the_o angle_n of_o inclination_n as_o the_o density_n of_o the_o medium_fw-la in_o which_o be_v c_o be_v to_o the_o density_n of_o the_o medium_fw-la in_o which_o be_v d_o that_o be_v by_o supposition_n as_o a_o g_z be_v to_z f_o e_o that_o be_v as_o d_o h_z be_v to_z b_o g_z and_o seeing_z d_o h_n be_v the_o sine_fw-la of_o the_o angle_n of_o inclination_n b_o g_o will_n therefore_o be_v the_o sine_fw-la of_o the_o angle_n refract_v wherefore_o b_o g_z will_v be_v the_o refracted_a line_n and_o lie_v in_o the_o plain_a separate_a superficies_n which_o be_v to_o be_v demonstrate_v coral_n it_o be_v therefore_o manifest_a that_o when_o the_o inclination_n be_v great_a than_o 45_o degree_n as_o also_o when_o it_o be_v less_o provide_v the_o density_n be_v great_a it_o may_v happen_v that_o the_o refraction_n will_v not_o enter_v the_o thin_a medium_fw-la at_o all_o 8_o if_o a_o body_n fall_v in_o a_o straight_a line_n upon_o another_o body_n and_o do_v not_o penetrate_v it_o but_o be_v reflect_v from_o it_o the_o angle_n of_o reflection_n will_v be_v equal_a to_o the_o angle_n of_o incidence_n let_v there_o be_v a_o body_n at_o a_o in_o the_o 5_o figure_n which_o fall_v with_o straight_a motion_n in_o the_o line_n a_o c_o upon_o another_o body_n at_o c_o pass_v no_o further_o but_o be_v reflect_v and_o let_v the_o angle_n of_o incidence_n be_v any_o angle_n as_o a_o c_o d._n let_v the_o straight_a line_n c_o e_o be_v draw_v making_z with_o d_o c_o produce_v the_o angle_n e_o c_o f_o equal_a to_o the_o angle_n a_o c_o d_o and_o let_v a_o d_o be_v draw_v perpendicular_a to_o the_o straight_a line_n d_o f._n also_o in_o the_o same_o straight_a line_n d_o f_o let_v c_o g_o be_v take_v equal_a to_o c_o d_o and_o let_v the_o perpendicular_a g_o e_z be_v raise_v cut_v c_o e_z in_o e._n this_o be_v do_v the_o triangle_n a_o c_o d_o and_o e_o c_o g_o will_n be_v equal_a and_o like_a let_v c_o h_n be_v draw_v equal_a and_o parallel_v to_o the_o straight_a line_n a_o d_o and_o let_v h_o c_o be_v produce_v indefinite_o to_o i._o last_o let_v e_o a_o be_v draw_v which_o will_v pass_v through_o h_n and_o be_v parallel_n and_o equal_a to_o g_o d._n i_o say_v the_o motion_n from_o a_o to_o c_o in_o the_o straight_a line_n of_o incidence_n ac_fw-la will_v be_v reflect_v in_o the_o straight_a line_n c_o e._n for_o the_o motion_n from_o a_o to_o c_o be_v make_v by_o two_o coefficient_a or_o concurrent_a motion_n the_o one_o in_o a_o h_n parallel_n to_o d_o g_o the_o other_z in_o a_o d_o perpendicular_a to_o the_o same_o d_o g_z of_o which_o two_o motion_n that_o in_o a_o h_n work_v nothing_o upon_o the_o body_n a_o after_o it_o have_v be_v move_v as_o far_o as_o c_o because_o by_o supposition_n it_o do_v not_o pass_v the_o straight_a line_n d_o g_z whereas_o the_o endeavour_n in_o a_o d_o that_o be_v in_o h_n c_o work_v further_a towards_o i._o but_o see_v it_o do_v only_o press_v and_o not_o penetrate_v there_o will_v be_v reaction_n in_o h_n which_o cause_v motion_n from_o c_o towards_o h_n and_o in_o the_o mean_a time_n the_o motion_n in_o h_n e_z remain_v the_o same_o it_o be_v in_o a_o h_n and_o therefore_o the_o body_n will_v now_o be_v move_v by_o the_o concourse_n of_o two_o motion_n in_o c_o h_n and_o h_n e_o which_o be_v equal_a to_o the_o two_o motion_n it_o have_v former_o in_o a_o h_n and_o h_o c._n wherefore_o it_o will_v be_v carry_v on_o in_o c_o e._n the_o angle_n therefore_o of_o reflection_n will_v be_v e_o c_o g_o equal_a by_o construction_n to_o the_o angle_n a_o c_o d_o which_o be_v to_o be_v demonstrate_v now_o when_o the_o body_n be_v consider_v but_o as_o a_o point_n it_o be_v all_o one_o whether_o the_o superficies_n or_o line_n in_o which_o the_o reflection_n be_v make_v be_v straight_o or_o crooked_a for_o the_o point_n of_o incidence_n and_o reflection_n c_o be_v as_o well_o in_o the_o crooked_a line_n which_o touch_v d_o g_z in_o c_z as_o in_o d_o g_z itself_o 9_o but_o if_o we_o suppose_v that_o not_o a_o body_n be_v move_v but_o some_o endeavour_n only_o be_v propagate_v from_o a_o to_o c_o the_o demonstration_n will_v nevertheless_o be_v the_o same_o for_o all_o endeavour_n be_v motion_n and_o when_o it_o have_v reach_v the_o solid_a body_n in_o c_o it_o press_v it_o and_o endeavour_v further_a in_o c_o i._n wherefore_o the_o reaction_n will_v proceed_v in_o c_o h_o and_o the_o endeavour_n in_o c_o h_n concur_v with_o the_o endeavour_n in_o h_n e_o will_v generate_v the_o endeavour_n in_o c_o e_o in_o the_o same_o manner_n as_o in_o the_o repercussion_n of_o body_n move_v if_o therefore_o endeavour_v be_v propagate_v from_o any_o point_n to_o the_o concave_a superficies_n of_o a_o spherical_a body_n the_o reflect_v line_n with_o the_o circumference_n of_o a_o great_a circle_n in_o the_o same_o sphere_n will_v make_v a_o angle_n equal_a to_o the_o angle_n of_o incidence_n for_o if_o endeavour_v be_v propagate_v from_o a_o in_o the_o 6_o fig._n to_o the_o circumference_n in_o b_o and_o the_o centre_n of_o the_o sphere_n be_v c_o and_o the_o line_n c_o b_o be_v draw_v as_o also_o the_o tangent_fw-la d_o b_o e_o and_o last_o if_o the_o angle_n f_o b_o d_o be_v make_v equal_a to_o the_o angle_n a_o b_o e_o the_o reflection_n will_v be_v make_v in_o the_o line_n b_o f_o as_o have_v be_v new_o show_v wherefore_o the_o angle_n which_o the_o straight_a line_n a_o b_o and_o f_o b_o make_n with_o the_o circumference_n will_v also_o be_v equal_a but_o it_o be_v here_o to_o be_v note_v that_o if_o c_o b_o be_v produce_v howsoever_o to_o g_z the_o endeavour_n in_o the_o line_n g_o b_o c_o will_n proceed_v only_o from_o the_o perpendicular_a reaction_n in_o g_z b_o and_o that_o therefore_o there_o will_v be_v no_o other_o endeavour_n in_o the_o point_n b_o towards_o the_o part_n which_o be_v within_o the_o sphere_n beside_o that_o which_o tend_v towards_o the_o centre_n and_o here_o i_o put_v a_o end_n to_o the_o three_o part_n of_o this_o discourse_n in_o which_o i_o have_v consider_v motion_n and_o magnitude_n by_o themselves_o in_o the_o abstract_n the_o four_o and_o last_o part_n concern_v the_o phaenomena_n of_o nature_n that_o be_v to_o say_v concern_v the_o motion_n and_o magnitude_n of_o the_o body_n which_o be_v part_n of_o the_o world_n real_a and_o existent_a be_v that_o which_o follow_v physiqve_n or_o the_o phaenomena_n of_o nature_n chap._n xxv_o of_o sense_n and_o animal_n motion_n 1_o the_o connexion_n of_o what_o have_v be_v say_v with_o that_o which_o follow_v 2_o the_o investigation_n of_o the_o nature_n of_o sense_n and_o the_o definition_n of_o sense_n 3_o the_o subject_a and_o object_n of_o sense_n 4_o the_o organ_n of_o sense_n 5_o all_o body_n be_v not_o endue_v with_o sense_n 6_o but_o one_o phantasm_n at_o one_o and_o the_o same_o time_n 7_o imagination_n the_o remain_v of_o past_a sense_n which_o also_o be_v memory_n of_o sleep_n 8_o how_o phantasm_n succeed_v one_o another_o 9_o dream_n whence_o they_o proceed_v 10_o of_o the_o sense_n their_o kind_n their_o organ_n and_o phantasm_n proper_a and_o common_a 11_o the_o magnitude_n of_o image_n how_o and_o by_o what_o it_o be_v determine_v 12_o pleasure_n pain_n appetite_n and_o aversion_n what_o they_o be_v 13_o deliberation_n and_o will_n what_o 1_o i_o have_v in_o the_o first_o chapter_n define_v philosophy_n to_o be_v knowledge_n of_o effect_n acquire_v
nothing_o but_o perturb_a light_n be_v comprehend_v wherefore_o the_o phantasm_n of_o a_o lucid_a body_n be_v light_n and_o of_o a_o colour_a body_n colour_n but_o the_o object_n of_o sight_n proper_o so_o call_v be_v neither_o light_n nor_o colour_n but_o the_o body_n itself_o which_o be_v lucid_a or_o enlighten_v or_o colour_v for_o light_n and_o colour_n be_v phantasm_n of_o the_o sentient_a can_v be_v accident_n of_o the_o object_n which_o be_v manifest_a enough_o from_o this_o that_o visible_a thing_n appear_v oftentimes_o in_o place_n in_o which_o we_o know_v assure_o they_o be_v not_o and_o that_o in_o different_a place_n they_o be_v of_o different_a colour_n and_o may_v at_o one_o and_o the_o same_o time_n appear_v in_o divers_a place_n motion_n rest_v magnitude_n and_o figure_n be_v common_a both_o to_o the_o sight_n and_o touch_n and_o the_o whole_a appearance_n together_o of_o figure_n and_o light_n or_o colour_n be_v by_o the_o greek_n common_o call_v 〈◊〉_d 〈◊〉_d 〈◊〉_d 〈◊〉_d 〈◊〉_d and_o by_o the_o latin_n species_n and_o imago_fw-la all_o which_o name_n signify_v no_o more_o but_o appearance_n the_o phantasm_n which_o be_v make_v by_o hear_v be_v sound_a by_o smell_n odour_n by_o taste_n savour_n and_o by_o touch_n hardness_n and_o softness_n heat_n and_o cold_a wetness_n oiliness_n and_o many_o more_o which_o be_v easy_a to_o be_v distinguish_v by_o sense_n then_o word_n smoothness_n roughness_n rarity_n and_o density_n refer_v to_o figure_n and_o be_v therefore_o common_a both_o to_o touch_v and_o sight_n and_o as_o for_o the_o object_n of_o hear_v smell_v taste_n and_o touch_v they_o be_v not_o sound_v odour_n savour_n hardness_n etc._n etc._n but_o the_o body_n themselves_o from_o which_o sound_n odour_n savour_n hardness_n etc._n etc._n proceed_v of_o the_o cause_n of_o which_o and_o of_o the_o manner_n how_o they_o be_v produce_v i_o shall_v speak_v hereafter_o but_o these_o phantasm_n though_o they_o be_v effect_n in_o the_o sentient_a as_o subject_a produce_v by_o object_n work_v upon_o the_o organ_n yet_o there_o be_v also_o other_o effect_n beside_o these_o produce_v by_o the_o same_o object_n in_o the_o same_o organ_n namely_o certain_a motion_n proceed_v from_o sense_n which_o be_v call_v animal_n motion_n for_o see_v in_o all_o sense_n of_o external_a thing_n there_o be_v mutual_a action_n and_o reaction_n that_o be_v two_o endeavour_n oppose_v one_o another_o it_o be_v manifest_a that_o the_o motion_n of_o both_o of_o they_o together_o will_v be_v continue_v every_o way_n especial_o to_o the_o confine_n of_o both_o the_o body_n and_o when_o this_o happen_v in_o the_o internal_a organ_n the_o endeavour_n outward_o will_v proceed_v in_o a_o solid_a angle_n which_o will_v be_v great_a and_o consequent_o the_o idea_n great_a than_o it_o will_v have_v be_v if_o the_o impression_n have_v be_v weak_a 11_o from_o hence_o the_o natural_a cause_n be_v manifest_a first_o why_o those_o thing_n seem_v to_o be_v great_a which_o caeteris_fw-la paribus_fw-la be_v see_v in_o a_o great_a angle_n second_o why_o in_o a_o serene_a cold_a night_n when_o the_o moon_n do_v not_o shine_v more_o of_o the_o fix_a star_n appear_v then_o at_o another_o time_n for_o their_o action_n be_v less_o hinder_v by_o the_o serenity_n of_o the_o air_n and_o not_o obscure_v by_o the_o great_a light_n of_o the_o moon_n which_o be_v then_o absent_a and_o the_o cold_a make_v the_o air_n more_o press_v help_v or_o strengthen_v the_o action_n of_o the_o star_n upon_o our_o eye_n in_o so_o much_o as_o star_n may_v then_o be_v see_v which_o be_v see_v at_o no_o other_o time_n and_o this_o may_v suffice_v to_o be_v say_v in_o general_a concern_v sense_n make_v by_o the_o reaction_n of_o the_o organ_n for_o as_o for_o the_o place_n of_o the_o image_n the_o deception_n of_o sight_n and_o other_o thing_n of_o which_o we_o have_v experience_n in_o ourselves_o by_o sense_n be_v they_o depend_v for_o the_o most_o part_n upon_o the_o fabric_n itself_o of_o the_o eye_n of_o man_n i_o shall_v speak_v of_o they_o then_o when_o i_o come_v to_o speak_v of_o man._n 12_o but_o there_o be_v another_o kind_n of_o sense_n of_o which_o i_o will_v say_v something_o in_o this_o place_n namely_o the_o sense_n of_o pleasure_n and_o pain_n proceed_v not_o from_o the_o reaction_n of_o the_o heart_n outward_o but_o from_o continual_a action_n from_o the_o outermost_a part_n of_o the_o organ_n towards_o the_o heart_n for_o the_o original_n of_o life_n be_v in_o the_o heart_n that_o motion_n in_o the_o sentient_n which_o be_v propagate_v to_o the_o heart_n must_v necessary_o make_v some_o alteration_n or_o diversion_n of_o vital_a motion_n namely_o by_o quicken_a or_o slacken_a help_a or_o hinder_v the_o same_o now_o when_o it_o help_v it_o be_v pleasure_n and_o when_o it_o hinder_v it_o be_v pain_n trouble_v grief_n etc._n etc._n and_o as_o phantasm_n seem_v to_o be_v without_o by_o reason_n of_o the_o endeavour_n outward_o so_o pleasure_n and_o pain_n by_o reason_n of_o the_o endeavour_n of_o the_o organ_n inward_o seem_v to_o be_v within_o namely_o there_o where_o the_o first_o cause_n of_o the_o pleasure_n or_o pain_n be_v as_o when_o the_o pain_n proceed_v from_o a_o wound_n we_o think_v the_o pain_n and_o the_o wound_n be_v both_o in_o the_o same_o place_n now_o vital_a motion_n be_v the_o motion_n of_o the_o blood_n perpetual_o circulate_v as_o have_v be_v show_v from_o many_o infallible_a sign_n and_o mark_n by_o doctor_n harvey_n the_o first_o observer_n of_o it_o in_o the_o vein_n and_o artery_n which_o motion_n when_o it_o be_v hinder_v by_o some_o other_o motion_n make_v by_o the_o action_n of_o sensible_a object_n may_v be_v restore_v again_o either_o by_o bend_v or_o set_v straight_o the_o part_n of_o the_o body_n which_o be_v do_v when_o the_o spirit_n be_v carry_v now_o into_o these_o now_o into_o other_o nerve_n till_o the_o pain_n as_o far_o as_o be_v possible_a be_v quite_o take_v away_o but_o if_o vital_a motion_n be_v help_v by_o motion_n make_v by_o sense_n than_o the_o part_n of_o the_o organ_n will_v be_v dispose_v to_o guide_v the_o spirit_n in_o such_o manner_n as_o conduce_v most_o to_o the_o preservation_n and_o augmentation_n of_o that_o motion_n by_o the_o help_n of_o the_o nerve_n and_o in_o animal_n motion_n this_o be_v the_o very_a first_o endeavour_n and_o find_v even_o in_o the_o embryo_n which_o while_o it_o be_v in_o the_o womb_n move_v its_o limb_n with_o voluntary_a motion_n for_o the_o avoid_n of_o whatsoever_o trouble_v it_o or_o for_o the_o pursue_v of_o what_o please_v it_o and_o this_o first_o endeavour_n when_o it_o tend_v towards_o such_o thing_n as_o be_v know_v by_o experience_n to_o be_v pleasant_a be_v call_v appetite_n that_o be_v a_o approach_v and_o when_o it_o shun_v what_o be_v troublesome_a aversion_n or_o fly_v from_o it_o and_o little_a infant_n at_o the_o beginning_n and_o as_o soon_o as_o they_o be_v bear_v have_v appetite_n to_o very_o few_o thing_n as_o also_o they_o avoid_v very_o few_o by_o reason_n of_o their_o want_n of_o experience_n and_o memory_n &_o therefore_o they_o have_v not_o so_o great_a a_o variety_n of_o animal_n motion_n as_o we_o see_v in_o those_o that_o be_v more_o grow_v for_o it_o be_v not_o possible_a without_o such_o knowledge_n as_o be_v derive_v from_o sense_n that_o be_v without_o experience_n and_o memory_n to_o know_v what_o will_v prove_v pleasant_a or_o hurtful_a only_o there_o be_v some_o place_n for_o conjecture_n from_o the_o look_n or_o aspect_n of_o thing_n and_o hence_o it_o be_v that_o though_o they_o do_v not_o know_v what_o may_v do_v they_o good_a or_o harm_n yet_o sometime_o they_o approach_v and_o sometime_o retire_v from_o the_o same_o thing_n as_o their_o doubt_n prompt_v they_o but_o afterward_o by_o accustom_v themselves_o by_o little_a and_o little_a they_o come_v to_o know_v ready_o what_o be_v to_o be_v pursue_v and_o what_o to_o be_v avoid_v and_o also_o to_o have_v a_o ready_a use_n of_o their_o nerve_n and_o other_o organ_n in_o the_o pursue_n and_o avoid_v of_o good_a and_o bad_a wherefore_o appetite_n and_o aversion_n be_v the_o first_o endeavour_n of_o animal_n motion_n consequent_a to_o this_o first_o endeavour_n be_v the_o impulsion_n into_o the_o nerve_n and_o retraction_n again_o of_o animal_n spirit_n of_o which_o it_o be_v necessary_a there_o be_v some_o receptacle_n on_o place_n near_o the_o original_n of_o the_o nerve_n and_o this_o motion_n or_o endeavour_n be_v follow_v by_o a_o swell_a and_o relaxation_n of_o the_o muscle_n and_o last_o these_o be_v follow_v by_o contraction_n and_o extension_n of_o the_o limb_n which_o be_v animal_n motion_n 13_o the_o consideration_n of_o appetite_n and_o aversion_n be_v divers_a for_o see_v live_a creature_n have_v sometime_o appetite_n and_o