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end_n angle_n equal_a line_n 1,594 5 9.8090 5 false
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ID Title Author Corrected Date of Publication (TCP Date of Publication) STC Words Pages
A44885 A learned treatise of globes, both cœlestiall and terrestriall with their several uses / written first in Latine, by Mr. Robert Hues, and by him so published ; afterward illustrated with notes by Jo. Isa. Pontanus ; and now lastly made English ... by John Chilmead ...; Tractatus de globis et eorum usu. English Hues, Robert, 1553-1632.; Chilmead, Edmund, 1610-1654.; Pontanus, Johannes Isacius, 1571-1639.; Molyneux, Emery. 1659 (1659) Wing H3298; ESTC R1097 145,949 311

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assent_v to_o pet._n nonius_n who_o will_v have_v the_o rumbe_n to_o consist_v of_o portion_n of_o great_a circle_n for_o see_v that_o the_o portion_n of_o a_o great_a circle_n be_v intercept_v betwixt_o divers_a meridian_n though_o never_o so_o little_a distant_a from_o each_o other_o make_v unequal_a angle_n with_o the_o same_o a_o rumbe_n can_v consist_v of_o they_o by_o the_o precedent_a proposition_n but_o this_o in-equality_n of_o angles_n be_v not_o perceive_v say_v he_o by_o the_o sense_n unless_o it_o be_v in_o meridian_n somewhat_o far_a remote_a from_o one_o another_o be_v it_o so_o notwithstanding_o the_o error_n of_o this_o position_n be_v discoverable_a by_o art_n and_o demonstration_n neither_o do_v it_o become_v so_o great_a a_o mathematician_n to_o examine_v rule_n of_o art_n by_o the_o judgement_n of_o the_o sense_n 6_o a_o great_a circle_n draw_v through_o the_o vertical_a point_n of_o any_o place_n and_o incline_v to_o the_o meridian_n make_v great_a angle_n with_o all_o other_o meridian_n than_o it_o do_v with_o that_o from_o whence_o it_o be_v first_o draw_v it_o therefore_o behoove_v that_o a_o line_n which_o make_v equal_a angle_n with_o divers_a meridian_n as_o the_o rumbe_n do_v be_v bow_v and_o turn_v in_o towards_o the_o meridian_n and_o hence_o it_o be_v that_o when_o a_o ship_n sail_v according_a to_o one_o and_o the_o same_o rumbe_n except_o it_o be_v one_o of_o the_o four_o principal_a and_o cardinal_n rumbe_n it_o make_v a_o crooked_a spiral_n line_n such_o as_o we_o see_v express_v in_o the_o terrestrial_a globe_n 7_o the_o portion_n of_o the_o same_o rumbe_n intercept_v betwixt_o any_o two_o parallel_n who_o difference_n of_o latitude_n be_v the_o same_o be_v also_o equal_a to_o each_o other_o therefore_o a_o equal_a segment_n of_o the_o same_o rumbe_n equal_o change_v the_o difference_n of_o latitude_n in_o all_o place_n and_o therefore_o that_o common_a rule_n of_o seaman_n be_v true_a that_o in_o a_o equal_a space_n pass_v in_o one_o &_o the_o same_o rumb_n one_o of_o the_o pole_n be_v equal_o elevate_v and_o the_o other_o depress_v so_o that_o michael_n coignet_n be_v find_v to_o be_v in_o a_o error_n who_o out_o of_o some_o certain_a ill_a ground_a position_n endeavour_v to_o prove_v the_o contrary_n out_o of_o the_o 4_o proposition_n there_o arise_v h_o this_o consectary_n namely_o that_o rumbe_n though_o continue_v never_o so_o far_o do_v not_o pass_v through_o the_o pole_n for_o see_v that_o the_o same_o rumbe_n be_v equal_o incline_v to_o all_o meridian_n and_o all_o meridian_n do_v pass_v through_o the_o pole_n it_o will_v then_o follow_v that_o if_o a_o rumbe_n shall_v pass_v through_o the_o pole_n the_o same_o line_n in_o the_o same_o point_n will_v cross_v infinite_a other_o line_n which_o be_v impossible_a because_o that_o a_o part_n of_o any_o angle_n can_v be_v equal_a to_o the_o whole_a neither_o do_v that_o which_o we_o deliver_v in_o the_o last_o proposition_n make_v any_o thing_n against_o this_o consectary_n to_o wit_n that_o betwixt_o any_o two_o parallel_n of_o equal_a distance_n equal_a portion_n of_o the_o same_o rumbe_n may_v be_v intercept_v that_o so_o it_o shall_v thence_o follow_v that_o the_o segment_n of_o any_o rumbe_n intercept_v betwixt_o the_o parallel_n of_o 80._o gr_n of_o latitude_n and_o the_o pole_n be_v equal_a to_o a_o segment_n of_o the_o same_o rumbe_n intercept_v betwixt_o the_o aequator_fw-la and_o the_o parallel_n of_o ten_o gr_n of_o latitude_n and_o the_o reason_n be_v because_o the_o pole_n be_v no_o parallel_n and_o therefore_o it_o be_v a_o true_a position_n of_o nonius_n that_o the_o rumbe_n do_v not_o enter_v the_o pole_n although_o it_o be_v not_o demonstrate_v with_o the_o like_a happy_a success_n for_o he_o assume_v foundation_n contrary_a to_o the_o truth_n as_o we_o say_v before_o and_o gemma_fw-la frisius_n also_o be_v mistake_v when_o he_o affirm_v in_o his_o appedix_fw-la ad_fw-la 15._o cap._n appian_n cosmography_n that_o the_o rumbe_n do_v concur_v in_o the_o pole_n which_o be_v the_o opinion_n also_o of_o some_o other_o who_o be_v therefore_o just_o tax_v by_o michael_n coignet_n these_o thing_n be_v well_o consider_v it_o will_v be_v easy_a to_o understand_v what_o manner_n of_o line_n a_o ship_n follow_v the_o direction_n of_o the_o magnet_n do_v describe_v in_o the_o sea_n if_o the_o forepart_n of_o the_o ship_n be_v direct_v towards_o the_o north_n or_o south_n which_o be_v the_o quarter_n that_o the_o magnetical_a needle_n always_o point_v at_o your_o course_n will_v be_v always_o under_o the_o same_o meridian_n because_o as_o we_o show_v in_o our_o three_o proposition_n the_o needle_n always_o respect_v the_o intersection_n of_o the_o horizon_n and_o meridian_n and_o be_v situate_a in_o the_o plain_a of_o the_o same_o meridian_n if_o the_o before_o part_n of_o the_o ship_n be_v direct_v to_o that_o quarter_n that_o fast_o and_o west_n rumbo_n point_v out_o in_o your_o course_n you_o will_v then_o describe_v either_o the_o aequator_fw-la or_o a_o circle_n parallel_n to_o it_o for_o if_o at_o the_o begin_n of_o your_o set_n forth_o your_o zenith_n be_v under_o the_o aequator_fw-la your_o ship_n will_v describe_v a_o arch_n or_o segment_n of_o the_o aequator_fw-la but_o if_o your_o vertical_a point_n be_v distant_a from_o the_o aequator_fw-la either_o northward_o or_o southward_o your_o course_n will_v then_o describe_v a_o parallel_n as_o far_o distant_a from_o the_o aequator_fw-la as_o the_o latitude_n of_o the_o place_n be_v whence_o you_o set_v forward_o at_o first_o as_o suppose_v our_o intend_a course_n to_o be_v from_o some_o place_n lie_v under_o the_o aequator_fw-la by_o the_o rumbe_n of_o the_o east_n and_o west_n we_o shall_v go_v forward_o still_o under_o the_o aequator_fw-la for_o by_o this_o mean_n as_o we_o go_v on_o we_o always_o meet_v with_o a_o new_a meridian_n which_o the_o line_n of_o our_o course_n cross_v at_o right_a angle_n now_o no_o other_o line_n beside_o the_o aequator_fw-la can_v do_v this_o as_o appear_v manifest_o out_o of_o the_o corollary_n of_o the_o first_o proposition_n and_o therefore_o in_o this_o course_n our_o ship_n must_v describe_v a_o portion_n of_o the_o aequator_fw-la but_o if_o we_o steer_v our_o course_n by_o the_o east_n and_o west_n rumbe_n from_o any_o place_n that_o lie_v beside_o the_o aequator_fw-la we_o shall_v be_v always_o under_o the_o same_o parallel_n for_o all_o circle_n parallel_v to_o the_o aequator_fw-la do_v cut_v all_o the_o meridian_n at_o right_a angle_n by_o the_o corollary_n of_o the_o first_o proposition_n and_o although_o the_o before_o part_n of_o the_o ship_n always_o respect_v the_o equinoctial_a east_n or_o west_n or_o intersection_n of_o the_o aequator_fw-la and_o horizon_n yet_o in_o our_o progress_n we_o shall_v never_o come_v near_o the_o aequator_fw-la but_o shall_v keep_v always_o a_o equal_a distance_n from_o