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compass_n of_o its_o virtue_n chap._n xvi_o that_o the_o force_n of_o draw_v and_o drive_v off_o can_v be_v hinder_v by_o no_o hindrance_n but_o this_o be_v above_o all_o wonder_n that_o you_o can_v never_o wonder_v so_o much_o as_o you_o shall_v that_o the_o force_n of_o the_o stone_n for_o attraction_n and_o repel_v can_v be_v include_v in_o no_o bound_n can_v be_v hinder_v by_o nothing_o or_o hold_v back_o but_o it_o will_v penetrate_v invisible_o and_o will_v move_v and_o stir_v those_o stone_n that_o be_v sympathize_v with_o it_o if_o they_o be_v put_v to_o it_o and_o will_v exercise_v its_o force_n as_o if_o there_o be_v nothing_o between_o but_o this_o must_v be_v within_o the_o compass_n of_o its_o virtue_n for_o if_o you_o hang_v some_o loadstone_n fit_o upon_o a_o table_n of_o wood_n stone_n or_o metal_n or_o lie_v equal_o balance_v and_o you_o shall_v put_v your_o loadstone_n under_o the_o table_n and_o stir_v it_o there_o the_o virtue_n of_o it_o will_v pass_v from_o this_o 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antipode_n in_o battle_n for_o stretch_v out_o a_o paper_n or_o set_v a_o table_n aloft_o the_o lodestone_n move_v above_o the_o table_n will_v do_v the_o same_o thing_n we_o speak_v of_o and_o show_v it_o to_o the_o spectator_n but_o if_o one_o that_o be_v ingenious_a do_v the_o business_n he_o will_v do_v more_o and_o great_a feat_n than_o we_o can_v write_v of_o chap._n xviii_o the_o situation_n make_v the_o virtue_n of_o the_o stone_n contrary_a it_o can_v want_v wonder_n as_o it_o do_v reason_n that_o the_o position_n shall_v show_v the_o virtue_n contrary_a to_o all_o that_o we_o have_v say_v for_o the_o stone_n put_v above_o the_o table_n will_v do_v
with_o the_o south_n point_n to_o the_o north_n i_o come_v to_o the_o three_o part_n that_o be_v to_o the_o iron_n touch_v with_o the_o loadstone_n and_o they_o be_v all_o wonderful_a i_o say_v then_o that_o when_o we_o know_v the_o north_n point_n of_o the_o stone_n and_o we_o have_v rub_v one_o end_n of_o the_o iron_n with_o it_o if_o it_o be_v equal_o balance_v or_o hang_v by_o a_o thread_n or_o lie_v free_o in_o a_o boat_n it_o will_v turn_v of_o itself_o to_o the_o south_n and_o that_o stand_v with_o reason_n for_o the_o loadstone_n impart_v its_o force_n to_o the_o iron_n for_o it_o be_v the_o natural_a force_n of_o the_o loadstone_n that_o be_v balance_v equal_o it_o shall_v turn_v its_o north_n point_n to_o the_o north_n and_o his_o south_n point_n to_o the_o south_n but_o when_o it_o be_v rub_v on_o the_o iron_n the_o upper_a part_n of_o the_o loadstone_n be_v fasten_v to_o the_o iron_n but_o the_o low_a part_n that_o be_v near_o to_o it_o be_v free_v wherefore_o if_o you_o rub_v the_o iron_n with_o the_o north_n part_n which_o fasten_v to_o the_o iron_n and_o touch_v its_o external_a superficies_n it_o will_v be_v northern_a that_o seem_v to_o to_o be_v southern_a and_o this_o south_n part_n will_v turn_v free_o to_o the_o north_n but_o contrary_o if_o you_o rub_v the_o south_n point_n against_o the_o iron_n the_o south_n point_n be_v fasten_v to_o the_o iron_n and_o the_o north_n point_n be_v let_v loose_a that_o turn_v to_o the_o north_n wherefore_o cardanus_n speak_v false_a that_o the_o iron_n touch_v by_o the_o north_n point_n will_v turn_v to_o the_o north_n and_o that_o which_o be_v touch_v by_o the_o south_n point_n will_v turn_v south_n for_o we_o see_v the_o contrary_n yet_o the_o iron_n must_v be_v touch_v with_o one_o point_n either_o the_o north_n or_o south_n point_n for_o if_o one_o part_n bend_v northward_o the_o other_o will_v tend_v southward_a by_o the_o use_n whereof_o so_o large_a sea_n be_v sail_v over_o that_o be_v the_o conductor_n our_o ancestor_n sail_v by_o see_v the_o sun_n by_o day_n and_o the_o star_n by_o night_n for_o in_o the_o middle_n of_o the_o sea_n as_o they_o wander_v they_o can_v no_o otherwise_o see_v the_o coast_n of_o the_o world_n but_o we_o can_v only_o discover_v what_o coast_n we_o be_v in_o but_o we_o can_v avoid_v the_o rock_n under_o the_o water_n and_o in_o cloudy_a day_n and_o dark_a night_n we_o can_v at_o all_o time_n know_v the_o pole_n of_o the_o world_n flavius_o say_v a_o italian_a find_v it_o out_o first_o who_o name_n be_v amalphus_n bear_v in_o our_o campania_n but_o he_o know_v not_o the_o mariner_n card_n but_o stick_v the_o needle_n in_o a_o reed_n or_o a_o piece_n of_o wood_n cross_z over_z and_o he_o put_v the_o needle_n into_o a_o vessel_n full_a of_o water_n that_o they_o may_v float_v free_o then_o carry_v about_o the_o loadstone_n the_o needle_n will_v follow_v it_o which_o be_v take_v away_o as_o by_o a_o certain_a natural_a motion_n the_o point_n of_o the_o needle_n will_v turn_v to_o the_o north_n pole_n and_o have_v find_v that_o stand_v still_o wherefore_o know_v the_o place_n before_o they_o steer_v their_o course_n thither_o now_o the_o mariner_n compass_n be_v make_v and_o a_o needle_n touch_v with_o the_o loadstone_n be_v so_o fit_v to_o it_o that_o by_o discover_v the_o pole_n by_o it_o all_o other_o part_n of_o the_o heaven_n be_v know_v there_o be_v make_v a_o rundle_n with_o a_o latin-navel_n upon_o a_o point_n of_o the_o same_o metal_n that_o it_o may_v run_v roundly_o free_o whereupon_o by_o the_o touch_v only_o of_o one_o end_n the_o needle_n not_o alone_o partake_v of_o the_o virtue_n of_o it_o but_o of_o the_o other_o end_n also_o whether_o it_o will_v or_o not_o for_o if_o you_o rub_v the_o needle_n with_o the_o north_n point_n of_o the_o stone_n present_o that_o part_n will_v turn_v to_o the_o south_n and_o the_o opposite_a part_n to_o the_o north_n and_o one_o virtue_n can_v be_v impart_v without_o the_o other_o so_o the_o needle_n touch_v by_o the_o south_n point_n of_o the_o stone_n will_v turn_v to_o the_o north_n and_o the_o other_o part_n to_o the_o south_n so_o that_o the_o part_n of_o the_o needle_n that_o be_v touch_v receive_v a_o contrary_a force_n from_o that_o the_o stone_n have_v chap._n xxxiii_o that_o iron_n touch_v by_o the_o loadstone_n will_v impart_v that_o force_n to_o other_o iron_n iron_n touch_v by_o the_o loadstone_n by_o that_o touch_n receive_v the_o virtue_n of_o the_o loadstone_n that_o it_o will_v do_v almost_o as_o much_o by_o attract_v and_o effect_v and_o turn_v itself_o to_o the_o pole_n so_o the_o iron_n hang_v free_o touch_v with_o the_o south_n point_n of_o the_o loadstone_n will_v turn_v free_o to_o the_o north_n if_o you_o apply_v the_o south_n part_n of_o the_o stone_n to_o the_o same_o it_o will_v turn_v to_o the_o south_n present_o but_o if_o you_o touch_v another_o iron_n with_o the_o iron_n that_o be_v touch_v that_o will_v turn_v to_o the_o south_n and_o do_v but_o point_v at_o it_o with_o the_o say_a point_n of_o the_o iron_n it_o will_v turn_v to_o the_o north_n and_o this_o force_n be_v not_o only_o send_v into_o the_o second_o iron_n but_o to_o a_o three_o and_o four_o as_o the_o force_n of_o the_o loadstone_n be_v for_o if_o it_o be_v a_o strong_a stone_n it_o will_v send_v its_o virtue_n through_o eight_o or_o ten_o needle_n chap._n xxxiv_o the_o virtue_n receive_v in_o the_o iron_n be_v weaken_v by_o one_o that_o be_v strong_a yet_o this_o i_o must_v tell_v you_o that_o the_o virtue_n receive_v by_o the_o iron_n be_v not_o fix_v and_o certain_a but_o be_v take_v off_o by_o a_o strong_a that_o take_v it_o from_o it_o as_o a_o iron_n touch_v by_o a_o weak_a northern_a point_n of_o the_o loadstone_n if_o you_o rub_v the_o same_o part_n of_o the_o iron_n with_o a_o south_n point_n of_o a_o strong_a loadstone_n it_o will_v vanish_v and_o that_o former_a force_n of_o turn_v itself_o to_o the_o south_n be_v take_v away_o and_o it_o take_v a_o southern_a virtue_n and_o will_v turn_v to_o the_o north_n without_o resistance_n but_o if_o the_o lodestone_n be_v of_o equal_a force_n they_o be_v so_o astonish_v and_o blunt_v that_o they_o will_v neither_o receive_v both_o nor_o either_o chap._n xxxv_o how_o in_o a_o stone_n the_o south_n or_o north_n point_n be_v discern_v among_o those_o way_n i_o show_v before_o i_o shall_v set_v down_o this_o also_o and_o perchance_o this_o be_v the_o best_a how_o to_o know_v the_o true_a northern_a and_o southern_a point_n let_v the_o loadstone_n be_v turn_v round_o by_o the_o wheel_n of_o the_o jeweller_n and_o polish_a then_o make_v a_o slender_a iron_n as_o long_o as_o the_o axeltre_n of_o that_o round_a ball_n and_o lay_v that_o upon_o the_o stone_n for_o it_o will_v turn_v itself_o upon_o that_o line_n that_o point_v just_a north_n and_o south_n mark_v the_o line_n upon_o the_o stone_n with_o some_o delible_a paint_n do_v the_o same_o on_o the_o otherside_n of_o the_o stone_n and_o where_o it_o rest_v upon_o the_o ball_n draw_v the_o same_o line_n do_v the_o same_o the_o three_o and_o four_o time_n upon_o the_o middle_n of_o it_o and_o where_o those_o line_n cross_v one_o the_o other_o and_o meet_a those_o be_v the_o polar_n point_v we_o may_v also_o find_v it_o out_o thus_o break_v a_o small_a needle_n and_o put_v the_o small_a piece_n upon_o the_o same_o ball_n and_o stir_v it_o for_o when_o it_o come_v to_o the_o just_a northern_a point_n the_o needle_n will_v stand_v upright_o that_o will_v make_v stander_n by_o admire_v and_o will_v stand_v perpendicular_o upon_o it_o and_o till_o it_o do_v rise_v thus_o be_v not_o weary_a of_o move_v it_o up_o and_o down_o for_o when_o you_o have_v find_v it_o you_o will_v be_v glad_a of_o it_o chap._n xxxvi_o how_o to_o rub_v the_o iron_n needle_n of_o the_o mariner_n compass_n i_o know_v that_o some_o be_v trouble_v how_o to_o rub_v the_o needle_n in_o the_o compass_n with_o the_o loadstone_n that_o it_o may_v get_v force_n to_o turn_v itself_o to_o the_o north_n pole_n it_o must_v be_v do_v thus_o when_o you_o have_v find_v the_o point_n in_o the_o stone_n as_o i_o say_v before_o strike_v the_o point_n light_o with_o a_o hammer_n and_o the_o plate_n will_v be_v full_a of_o stiff_a hair_n upon_o which_o if_o you_o rub_v a_o iron_n needle_n it_o will_v present_o get_v virtue_n to_o turn_v itself_o to_o the_o pole_n yet_o observe_v this_o that_o if_o you_o will_v have_v your_o needle_n turn_v to_o the_o north_n you_o must_v rub_v it_o on_o the_o south_n point_n but_o if_o to_o the_o south_n rub_v it_o with_o the_o
if_o you_o put_v that_o part_n to_o it_o from_o which_o it_o receive_v its_o force_n it_o will_v not_o endure_v it_o but_o drive_v it_o from_o it_o and_o draw_v to_o it_o the_o contrary_a and_o opposite_a part_n namely_o the_o southern_a part_n the_o reason_n whereof_o i_o set_v down_o before_o the_o same_o fall_v out_o if_o you_o touch_v the_o needle_n with_o the_o south_n part_n of_o the_o loadstone_n for_o if_o you_o present_o put_v the_o same_o to_o it_o it_o will_v resist_v it_o and_o draw_v to_o it_o the_o north_n point_fw-fr hence_o the_o part_n that_o be_v alike_o be_v at_o enmity_n and_o reject_v as_o adversary_n and_o the_o part_n that_o be_v unlike_a do_v agree_v as_o friend_n whence_o it_o be_v apparent_a that_o the_o loadstone_n impart_v to_o the_o iron_n a_o contrary_a force_n from_o what_o the_o end_n itself_o be_v and_o the_o steel_n receive_v the_o force_n of_o that_o point_n of_o the_o loadstone_n which_o it_o touch_v not_o and_o i_o prove_v it_o thus_o take_v two_o needle_n and_o put_v they_o in_o boat_n or_o hang_v they_o by_o thread_n that_o be_v touch_v with_o the_o loadstone_n they_o may_v move_v free_o they_o be_v contrary_a one_o to_o the_o other_o and_o they_o will_v join_v in_o the_o part_n that_o be_v touch_v with_o contrary_a end_n of_o the_o loadstone_n and_o will_v not_o endure_v the_o end_n that_o be_v alike_o chap._n xli_o two_o needle_n touch_v by_o the_o loadstone_n obtain_v contrary_a force_n i_o will_v relate_v a_o strange_a thing_n yet_o not_o far_o from_o reason_n if_o you_o touch_v two_o needle_n with_o a_o loadstone_n together_o and_o set_v they_o on_o the_o same_o point_n of_o it_o the_o other_o part_n that_o hang_v on_o the_o loadstone_n will_v abhor_v and_o fly_v one_o from_o the_o other_o and_o if_o you_o force_v they_o together_o with_o your_o hand_n so_o soon_o as_o you_o let_v they_o alone_o they_o will_v present_o return_v to_o their_o posture_n and_o depart_v as_o far_o as_o they_o can_v from_o one_o another_o the_o reason_n be_v this_o that_o if_o two_o needle_n stick_v fast_o to_o one_o northern_a point_n of_o the_o loadstone_n with_o their_o point_n you_o must_v imagine_v that_o they_o do_v receive_v a_o southern_a virtue_n and_o because_o they_o be_v of_o the_o same_o similitude_n they_o will_v not_o endure_v one_o the_o other_o and_o because_o they_o be_v fasten_v to_o the_o loadstone_n they_o can_v get_v off_o be_v compel_v by_o a_o great_a force_n but_o the_o opposite_a point_n of_o the_o needle_n because_o they_o be_v both_o alike_o northerly_a they_o must_v needs_o abhor_v one_o the_o other_o and_o when_o they_o be_v free_a one_o will_v part_v from_o the_o other_o and_o when_o they_o be_v so_o hang_v on_o if_o you_o put_v to_o they_o the_o southern_a part_n of_o another_o loadstone_n they_o will_v present_o let_v go_v their_o hold_n and_o go_v as_o far_o off_o as_o they_o can_v that_o sometime_o they_o be_v pull_v off_o from_o the_o loadstone_n be_v force_v by_o a_o invisible_a vapour_n chap._n xlii_o that_o the_o force_n of_o the_o iron_n that_o draw_v will_v drive_v off_o iron_n by_o diversity_n of_o situation_n that_o as_o i_o say_v of_o the_o loadstone_n alone_o be_v true_a of_o the_o iron_n that_o be_v touch_v with_o it_o for_o if_o you_o put_v a_o needle_n touch_v with_o a_o loadstone_n by_o a_o boat_n swim_v in_o the_o water_n or_o hang_v by_o a_o thread_n or_o turn_v on_o a_o point_n equal_o balance_v if_o you_o put_v upon_o this_o a_o needle_n touch_v with_o a_o loadstone_n it_o will_v draw_v it_o and_o that_o part_n that_o attract_v the_o iron_n above_o will_v put_v underneath_o drive_v it_o away_o and_o the_o part_n that_o drive_v off_o above_o will_v draw_v to_o it_o put_v underneath_o where_o you_o may_v observe_v that_o the_o position_n will_v work_v contrary_a operation_n chap._n xliii_o the_o needle_n touch_v by_o the_o loadstone_n on_o one_o part_n do_v not_o always_o receive_v virtue_n on_o both_o part_n if_o the_o needle_n be_v touch_v at_o one_o end_n by_o the_o loadstone_n it_o receive_v virtue_n at_o that_o end_n and_o at_o the_o other_o end_n the_o contrary_a virtue_n but_o that_o must_v not_o be_v understand_v absolute_o but_o of_o that_o needle_n that_o be_v of_o a_o proportionable_a length_n for_o if_o it_o be_v too_o long_o the_o virtue_n will_v not_o come_v to_o the_o other_o end_n but_o will_v we_o know_v how_o far_o the_o virtue_n be_v come_v we_o must_v know_v how_o far_o reach_v the_o circumference_n of_o the_o virtue_n as_o i_o say_v therefore_o if_o the_o circumference_n of_o it_o be_v a_o foot_n the_o force_n will_v go_v a_o foot-long_a into_o the_o needle_n if_o we_o will_v try_v this_o touch_v a_o long_a needle_n three_o foot_n long_o with_o a_o loadstone_n at_o one_o end_n if_o it_o touch_v the_o iron_n at_o the_o other_o end_n the_o iron_n touch_v will_v not_o move_v from_o its_o place_n but_o if_o you_o touch_v it_o a_o foot_n or_o two_o long_a namely_o as_o far_o as_o the_o circumference_n of_o the_o lodestone_n virtue_n will_v reach_v and_o then_o touch_v the_o needle_n it_o will_v present_o move_v and_o be_v draw_v by_o it_o chap._n xliv_o the_o needle_n touch_v in_o the_o middle_n by_o the_o loadstone_n send_v forth_o its_o force_n at_o both_o end_n if_o the_o needle_n be_v somewhat_o too_o long_o and_o we_o rub_v it_o with_o the_o stone_n in_o the_o middle_n of_o it_o the_o force_n of_o the_o stone_n part_n be_v diffuse_v to_o both_o end_n of_o it_o but_o very_o obscure_o for_o you_o shall_v not_o know_v which_o be_v the_o end_n but_o if_o you_o touch_v it_o something_o far_o from_o the_o middle_n the_o near_a part_n will_v receive_v the_o force_n of_o the_o part_n that_o touch_v it_o be_v it_o the_o northerly_a or_o southerly_a part_n chap._n xlv_o a_o iron_n ring_v touch_v by_o a_o loadstone_n will_v receive_v both_o virtue_n but_o if_o we_o rub_v a_o iron_n ring_n on_o the_o one_o side_n with_o a_o loadstone_n than_o the_o part_n that_o be_v touch_v will_v receive_v the_o virtue_n of_o the_o part_n of_o the_o loadstone_n that_o touch_v it_o and_o the_o opposite_a part_n will_v receive_v the_o contrary_a and_o therefore_o the_o middle_n of_o the_o iron_n ring_n will_v be_v capable_a but_o of_o half_a the_o force_n of_o it_o as_o if_o it_o be_v straight_o but_o if_o we_o make_v a_o pin_n round_o as_o a_o ring_n and_o the_o part_n joint_v together_o with_o a_o joint_n be_v rub_v with_o a_o loadstone_n and_o be_v rub_v be_v stretch_v straight_o again_o the_o end_n shall_v receive_v the_o same_o virtue_n be_v it_o northern_a or_o southern_a but_o by_o degree_n that_o force_n will_v grow_v feeble_a and_o in_o a_o short_a time_n become_v northerly_a and_o the_o other_o southerly_a or_o will_v receive_v more_o virtue_n than_o it_o first_o have_v may_v be_v when_o it_o be_v touch_v far_o from_o the_o end_n but_o if_o you_o will_v that_o of_o these_o a_o chain_n of_o iron_n shall_v hang_v in_o the_o air_n so_o soon_o as_o one_o ring_n touch_v on_o one_o side_n with_o the_o loadstone_n have_v receive_v force_n on_o the_o other_o side_n by_o it_o we_o may_v hang_v a_o chain_n of_o ring_n in_o the_o air_n as_o we_o may_v of_o lodestone_n so_o then_o if_o the_o ring_n be_v lay_v in_o order_n upon_o a_o table_n that_o they_o may_v one_o touch_v the_o other_o though_o they_o do_v not_o fasten_v put_v the_o loadstone_n to_o they_o and_o not_o only_o the_o first_o will_v be_v draw_v but_o the_o next_o and_o the_o three_o that_o they_o will_v hang_v like_o link_n of_o ring_n and_o not_o only_o will_v it_o be_v so_o if_o the_o loadstone_n touch_v the_o first_o that_o the_o rest_n will_v follow_v but_o if_o the_o stone_n be_v but_o near_o it_o will_v do_v the_o same_o without_o touch_v they_o chap._n xlvi_o a_o iron_n plate_n touch_v in_o the_o middle_n will_v diffuse_v its_o force_n to_o both_o end_n what_o i_o say_v of_o a_o long_a needle_n i_o say_v also_o of_o a_o iron_n bar_n for_o if_o you_o touch_v it_o in_o the_o middle_n the_o beam_n of_o it_o be_v spread_v like_o the_o beam_n of_o the_o sun_n or_o light_n of_o a_o candle_n from_o the_o centre_n to_o the_o circumference_n and_o extreme_a part_n but_o if_o we_o touch_v a_o iron_n morter_n be_v the_o force_n be_v feeble_a where_o it_o be_v touch_v about_o the_o superficies_n some_o virtue_n may_v be_v be_v perceive_v but_o it_o be_v very_o weak_a in_o the_o extreme_a part_n chap._n xlvii_o how_o file_n of_o iron_n may_v receive_v force_n if_o you_o wrap_v up_o file_n of_o iron_n in_o a_o paper_n as_o druggist_n do_v like_o a_o pyramid_n and_o put_v a_o loadstone_n near_o it_o all_o the_o file_n together_o will_v receive_v
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vessel_n let_v it_o stand_v a_o while_n the_o oil_n will_v swim_v on_o the_o top_n and_o the_o water_n will_v sink_v down_o to_o the_o bottom_n but_o stop_v the_o mouth_n of_o it_o with_o your_o finger_n so_o that_o remove_v it_o away_o the_o water_n may_v first_o run_v out_o and_o the_o oil_n sink_v down_o by_o degree_n when_o it_o be_v descend_v into_o the_o narrow_a part_n so_o that_o the_o oil_n become_v next_o to_o your_o finger_n stop_v the_o hole_n and_o let_v the_o orifice_n be_v but_o half_a open_a for_o the_o water_n to_o pass_v out_o when_o it_o be_v all_o run_v out_o empty_v the_o oil_n into_o another_o small_a vessel_n there_o be_v another_o very_a ingenious_a instrument_n find_v out_o for_o to_o separate_v oil_n with_o a_o great_a belly_n and_o a_o narrow_a neck_n which_o a_o little_a nose_n in_o the_o middle_n pour_v the_o oil_n mix_v with_o water_n into_o the_o vessel_n the_o water_n will_v possess_v the_o bottom_n the_o oil_n the_o neck_n drop_v water_n gentle_o into_o 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divide_v one_o part_n into_o ten_o and_o that_o one_o into_o ten_o part_n more_o and_o those_o be_v ten_o of_o ten_o let_v a_o be_v nul_fw-fr that_o be_v a_o cyfer_n and_o there_o place_n sixty_o the_o second_o part_n sixty_o one_o the_o line_n join_v to_o right_a angle_n will_v be_v two_o the_o three_o part_n sixty_o two_o the_o line_n join_v to_o it_o will_v be_v five_o so_o the_o twenty_o part_n will_v be_v eighty_o and_o the_o line_n join_v to_o the_o angle_n fifty_o six_o to_o the_o extremity_n of_o these_o line_n i_o fasten_v a_o pin_n and_o i_o put_v a_o brass_n cithern-wire_n upon_o they_o and_o upon_o it_o i_o draw_v a_o line_n and_o the_o parabolical_a line_n be_v exact_o describe_v by_o it_o for_o shall_v we_o draw_v it_o without_o the_o help_n of_o this_o cord_n it_o will_v be_v waver_v and_o not_o perfect_a then_o take_v a_o brass_n table_n of_o convenient_a thickness_n and_o draw_v the_o line_n now_o find_v upon_o it_o file_v away_o all_o that_o that_o shall_v be_v 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their_o proportion_n keep_v by_o be_v far_o remove_v therefore_o it_o may_v reverberate_v and_o burn_v where_o the_o cane_n seem_v clear_a which_o will_v be_v near_o the_o centre_n nor_o be_v it_o far_o distant_a from_o the_o point_n where_o the_o ray_n meet_v but_o near_o the_o ray_n come_v forth_o from_o that_o point_n from_o the_o superficies_n of_o the_o glass_n call_v parabolicall_a which_o must_v remain_v firm_a in_o that_o place_n which_o i_o say_v before_o let_v experiment_n be_v make_v of_o its_o virtue_n by_o thread_n pass_v from_o its_o centre_n or_o iron_n wire_n or_o hair_n and_o it_o be_v no_o matter_n whether_o it_o be_v parabolical_a or_o spherical_a or_o any_o section_n of_o the_o same_o order_n then_o let_v it_o be_v excellent_a well_o fit_v upon_o the_o centre_n of_o the_o say_a section_n if_o the_o ray_n go_v forth_o above_o or_o a_o little_a beneath_o it_o be_v no_o matter_n if_o not_o much_o money_n or_o much_o money_n be_v lay_v out_o to_o make_v it_o the_o 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burn_a and_o by_o burn_v it_o lose_v its_o brightness_n let_v it_o be_v therefore_o of_o glass_n a_o finger_n thick_a let_v the_o tin_n foil_n be_v of_o purge_a antimony_n and_o lead_v such_o as_o they_o make_v in_o germany_n let_v the_o form_n be_v of_o clay_n put_v the_o glass_n upon_o it_o and_o melt_v it_o in_o a_o glass_n furnace_n that_o it_o may_v take_v its_o form_n this_o be_v a_o wonder_n that_o that_o which_o cause_v so_o much_o burn_v in_o the_o work_n be_v cold_a or_o at_o most_o but_o lukewarm_a if_o you_o will_v have_v it_o burn_v before_o of_o the_o section_n which_o be_v about_o the_o basis_n make_v a_o circle_n in_o the_o middle_a point_n whereof_o fit_a the_o artifice_n that_o the_o ray_n return_v may_v come_v forth_o to_o the_o before_o part_n this_o i_o have_v say_v and_o i_o have_v observe_v that_o we_o may_v use_v this_o artifice_n in_o great_a and_o wonderful_a thing_n and_o chief_o by_o inscribe_v letter_n in_o a_o full_a moon_n for_o whatsoever_o we_o have_v write_v by_o this_o glass_n as_o i_o say_v of_o a_o plain_a glass_n we_o may_v send_v letter_n of_o it_o to_o a_o very_a great_a distance_n and_o because_o i_o say_v it_o send_v forth_o to_o infinite_a distance_n it_o be_v send_v as_o far_o as_o the_o moon_n especial_o be_v help_v by_o its_o light_n chap._n xviii_o to_o make_v a_o burning-glass_n of_o many_o spherical_a section_n vitellio_n describe_v a_o certain_a composition_n of_o a_o burning-glass_n make_v of_o divers_a sphaeral_a section_n but_o what_o he_o write_v he_o prove_v not_o nor_o do_v he_o understand_v what_o he_o say_v whilst_o i_o be_v search_v for_o that_o i_o find_v this_o propound_v the_o distance_n of_o combustion_n let_v