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book_n account_n george_n great_a 42 3 2.1254 3 false
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ID Title Author Corrected Date of Publication (TCP Date of Publication) STC Words Pages
A74866 The geometrical sea-man: or, the art of navigation performed by geometry. Shewing how all the three kinds of sayling, viz. by the plain chart, by Mercators chart, by a great circle. may be easily and exactly performed by a plain ruler and a pair of compasses, without arithmeticall calculation. / By Henry Phillippes. Phillippes, Henry, d. 1677? 1652 (1652) Thomason E652_10; ESTC R205892 65,784 93

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09_o 335_o 0_o 45_o 42_o 70_o 6_o from_o g_o to_o h_z east_n 2_o 09_o 338_o 0_o 45_o 42_o 70_o 7_o from_o h_z to_z i_z ½_n 4_o 93_o 345_o 0_o 45_o 13_o 22_o 8_o from_o i_o to_o k_n e_o by_o s_n 7_o 26_o 355_o 0_o 43_o 48_o 80_o 9_o from_o k_n to_o l_o ½_n 7_o 69_o 005_o 0_o 41_o 34_o 57_o 10_o from_o l_o to_o p_o e_o s_o e_o 4_o 09_o 010_o 0_o 40_o 0_o 0_o the_o sum_n  _fw-fr 52_o 12_o  _fw-fr  _fw-fr you_o must_v not_o think_v to_o find_v these_o course_n and_o distance_n which_o i_o have_v set_v down_o in_o this_o table_n chart._n how_o to_o work_v upon_o a_o large_a chart._n can_v be_v so_o exact_o find_v out_o by_o the_o former_a general_a chart_n which_o be_v draw_v by_o i_o lesser_a meridian_n line_n but_o if_o you_o draw_v two_o or_o three_o blank_a charts_n by_o the_o large_a meridian_n line_n in_o two_o or_o three_o sheet_n of_o paper_n you_o may_v then_o find_v they_o out_o easy_o and_o as_o exact_o as_o need_v be_v in_o these_o several_a charts_n you_o may_v set_v down_o 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to_o do_v now_o in_o this_o follow_a chart_n be_v fit_v to_o the_o latitude_n you_o must_v sail_v under_o first_o set_v down_o your_o first_o place_n n_n according_a to_o the_o latitude_n thereof_o which_o be_v 40_o degree_n then_o prick_v down_o the_o latitude_n of_o the_o great_a circle_n at_o the_o first_o five_o degree_n of_o longitude_n which_o be_v 41_o degree_n 34_o minute_n at_o a_o then_o lay_v your_o ruler_n from_o n_n to_o a_o prick_v out_o the_o line_n n_o a_o which_o will_v represent_v the_o arch_n of_o the_o circle_n from_o n_n to_o a._n then_o the_o latitude_n of_o the_o circle_n for_o the_o next_o 5_o degree_n be_v 42_o degree_n 53_o minute_n or_o 88_o 100_o part_n this_o must_v be_v set_v down_o at_o r_n and_o then_o draw_v the_o prick_a line_n from_o a_o to_o r_n so_o you_o have_v the_o arch_n of_o the_o circle_n from_o n_n to_o r._n now_o if_o you_o will_v know_v what_o course_n you_o must_v steer_v by_o your_o scale_n of_o rumbe_n you_o shall_v find_v that_o from_o 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the_o shortness_n of_o the_o chart_n i_o be_o force_v to_o break_v off_o the_o circle_n &_o the_o rumbe-line_n &_o set_v they_o in_o the_o first_o meridian_n at_o c_o then_z 5_o deg_fw-la from_o the_o meridian_n at_o c_o that_o be_v 20_o deg_fw-la from_o n_n i_o prick_v down_o the_o latitude_n of_o the_o arch_n which_o be_v 44_o deg_fw-la 42_o minute_n or_o 70_o part_n at_o 20_o and_o five_o degree_n from_o this_o 20_o i_o prick_v down_o the_o latitude_n of_o the_o arch_n in_o that_o longitude_n which_o be_v 45_o degree_n 15_o minute_n or_o 25_o part_n at_z c_o then_z i_o draw_v the_o prick_v line_n from_o c_o to_o 20_o and_o from_o 20_o to_o e_o which_o represent_v the_o arch_n and_o i_o likewise_o draw_v the_o rumble_a line_n n_n by_o e_z from_o c_o to_o e_z which_o do_v very_o near_o concur_v with_o the_o arch_n at_o e_o and_o the_o distance_n from_o c_o to_o e_z be_v 7_o degree_n and_o almost_o ●_o 10_o or_o as_o in_o the_o the_o table_n 7_o degree_n 26_o 100_o here_o again_o by_o reason_n of_o the_o shortness_n of_o the_o chart_n i_o be_o force_v to_o break_v off_o again_o and_o set_v the_o latitude_n of_o this_o point_n e_o in_o the_o first_o meridian_n at_o e_o 5_o degree_n from_o this_o i_o set_v down_o the_o latitude_n of_o the_o arch_n of_o the_o great_a circle_n belong_v to_o that_o longitude_n which_o be_v 45_o degree_n 35_o minute_n or_o 58_o part_n at_o 30_o this_o meridian_n be_v 30_o degree_n distant_a from_o the_o first_o place_n at_o n._n and_o then_o 5_o degree_n from_o this_o which_o be_v 35_o degree_n from_o the_o first_o meridian_n at_o n_n i_o set_v down_o the_o latitude_n of_o the_o arch_n which_o be_v 45_o degree_n 41_o minute_n or_o 68_o part_n at_o g_o then_z i_o draw_v the_o prick_v line_n from_o e_o to_o 30_o and_o from_o 30_o to_o g_o this_o represent_v the_o arch_n now_o at_o the_o point_n e_o i_o alter_v my_o course_n half_o a_o point_n more_o to_o the_o eastward_o therefore_o by_o the_o scale_n of_o rumbe_n set_v off_o 7_o point_n and_o a_o half_a from_o the_o point_n e_o i_o draw_v the_o line_n e_o f_o which_o be_v n_n by_o e_z half_z a_o point_n to_o the_o east_n and_o have_v sail_v upon_o this_o point_n from_o e_z to_z f_o the_o latitude_n will_v be_v 45_o degree_n 42_o minute_n or_o 70_o part_n and_o the_o difference_n of_o longitude_n from_o e_z be_v 7_o degree_n and_o the_o distance_n from_o e_z be_v 4_o degree_n 9_o 10_o but_o the_o difference_n of_o longitude_n from_o the_o first_o place_n at_o n_n be_v 32_o degree_n last_o because_o now_o i_o be_o as_o far_o to_o the_o northward_o as_o the_o arch_n of_o the_o great_a circle_n will_v allow_v i_o i_o here_o at_o f_o alter_v my_o course_n half_o a_o point_n more_o and_o so_o sail_v from_o f_o to_o g_o full_a east_n so_o i_o have_v alter_v my_o longitude_n in_o all_o 35_o degree_n and_o be_o come_v just_o one_o half_a of_o the_o voyage_n now_o to_o perform_v the_o other_o half_o you_o must_v continue_v to_o do_v as_o you_o do_v before_o first_o prick_v out_o the_o great_a circle_n and_o then_o find_v out_o the_o rumbe_n you_o must_v sail_v upon_o from_o one_o point_n to_o another_o which_o you_o may_v alter_v now_o and_o then_o half_a a_o point_n and_o so_o you_o may_v lay_v the_o pole_n in_o the_o same_o order_n and_o proportion_n that_o before_o you_o raise_v it_o as_o you_o may_v see_v by_o the_o table_n before_o page_z 61._o chap._n vi_o show_v