which_o make_v a_o crooked_a line_n for_o to_o join_v they_o together_o we_o shall_v have_v the_o thickness_n of_o the_o joint_n of_o the_o cross_n of_o the_o vault_n as_o one_o may_v see_v at_o half_a of_o the_o left_a side_n of_o the_o figure_n aforego_v a_o vault_n make_v by_o the_o order_n aforego_v all_o the_o order_n aforego_v do_v show_v sufficient_a easiness_n for_o to_o make_v a_o perfect_a vault_n as_o this_o here_o except_o what_o concern_v the_o pillar_n or_o column_n which_o we_o will_v show_v hereafter_o of_o arch_n and_o door_n with_o three_o square_n there_o be_v another_o kind_n of_o fret_a ceiling_n which_o hold_v the_o place_n of_o a_o roof_n for_o gate_n and_o gallery_n and_o also_o in_o church_n which_o make_v well_o also_o in_o perspective_n and_o be_v very_o easy_a to_o practice_v i_o have_v set_v it_o after_o the_o round_a because_o that_o it_o be_v frame_v of_o a_o demi-circle_n as_o a_o round_a door_n which_o after_o be_v to_o be_v divide_v have_v elevate_v 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vault_n like_o a_o scallop-shell_n set_v into_o perspective_n this_o figure_n may_v serve_v for_o the_o hollow_a of_o a_o church_n for_o a_o grotte_n or_o cave_n for_o a_o hollow_a nest_n in_o a_o wall_n and_o the_o like_a piece_n the_o elevation_n be_v make_v in_o the_o same_o manner_n and_o by_o the_o order_n that_o we_o have_v speak_v of_o for_o this_o flat_a band_n a_o b_o which_o may_v serve_v for_o a_o cornish_a its_o diminution_n must_v be_v take_v upon_o the_o line_n of_o elevation_n in_o c_o d_o and_o to_o carry_v it_o upon_o the_o pilaster_n for_o the_o vault_n we_o must_v make_v the_o first_o arch_n e_o f_o in_o the_o manner_n that_o we_o have_v say_v and_o in_o the_o midst_n within_o to_o make_v a_o demi-circle_n o_o to_o the_o which_o we_o shall_v draw_v crooked_a line_n which_o shall_v rise_v above_o the_o pilaster_n and_o shall_v make_v the_o side_n or_o nerve_n of_o the_o vault_n as_o we_o see_v g_o h_n i_o k_o the_o height_n of_o the_o window_n shall_v be_v take_v upon_o the_o line_n of_o elevation_n between_o l_o and_z m._n the_o figure_n will_v help_v for_o the_o rest_n of_o open_a round_n in_o steeple_n or_o vault_n pierce_v in_o perspective_n have_v make_v the_o plane_n of_o the_o double_a round_n fol._n 24._o and_o mark_v between_o the_o two_o circle_n the_o place_n and_o the_o number_n of_o the_o pilaster_n which_o one_o will_v have_v there_o the_o which_o ought_v to_o draw_v towards_o the_o centre_n a_o we_o must_v mark_v the_o height_n which_o we_o will_v give_v from_o the_o ground_n unto_o the_o hollow_a of_o the_o lovure_fw-fr as_o here_o the_o line_n d_o and_o e_o on_o high_a the_o which_o must_v serve_v for_o the_o base_a where_o we_o shall_v transport_v the_o same_o measure_n which_o be_v upon_o the_o line_n b_o g._n and_o from_o the_o same_o point_n of_o sight_n g_o to_o make_v a_o plane_n on_o high_a as_o that_o below_o whence_o all_o the_o place_n of_o the_o pilaster_n shall_v draw_v towards_o the_o centre_n h_n for_o to_o 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which_o shall_v be_v raise_v from_o the_o point_n as_o k_o l_o n_o o_o p_o q_o and_o so_o of_o the_o other_o he_o that_o in_o the_o place_n of_o the_o round_a will_v have_v a_o square_a or_o a_o polygone_a have_v need_n only_o to_o keep_v the_o same_o method_n and_o he_o shall_v do_v all_o that_o he_o will_v with_o the_o same_o facility_n see_v that_o this_o which_o be_v the_o hard_a be_v not_o difficult_a that_o the_o multitude_n of_o object_n and_o the_o plurality_n of_o story_n aught_o to_o have_v but_o one_o point_n of_o sight_n i_o have_v already_o say_v elsewhere_o that_o one_o never_o ought_v to_o set_v more_o than_o
must_v take_v six_o part_n of_o the_o lâ—ne_n a_o b_o which_o shall_v be_v a_o d_o and_o divide_v they_o eaâ—â—_n into_o 4_o and_o these_o 24_o part_n shall_v serve_v for_o a_o scale_n for_o the_o depth_n or_o removall_n be_v sufficient_a for_o to_o let_v they_o out_o infinite_o and_o the_o six_o part_n that_o remain_v between_o b_o d_o shall_v be_v the_o scale_n which_o shall_v furnish_v the_o measure_n of_o these_o according_a as_o the_o line_n draw_v from_o the_o point_v find_v by_o the_o plane_n shall_v divide_v the_o ray_n draw_v to_o the_o point_n of_o sâ—â—_n g_o for_o as_o this_o scale_n be_v a_o pyramid_n whereof_o b_o d_o be_v the_o base_a the_o measure_n diminish_v in_o proportion_n as_o they_o be_v sink_v have_v divide_v the_o one_o of_o these_o part_n into_o inch_n for_o to_o find_v there_o all_o the_o measure_n as_o they_o be_v upon_o the_o plane_n with_o the_o scale_n or_o removall_n we_o find_v the_o point_n of_o the_o plane_n and_o with_o that_o of_o the_o measure_v the_o length_n that_o 〈◊〉_d line_n ought_v to_o have_v aswell_o for_o the_o plane_n as_o for_o the_o elevation_n how_o for_o to_o find_v the_o plane_n in_o perspective_n we_o must_v observe_v all_o the_o measure_n of_o the_o geometrical_a plane_n the_o 〈◊〉_d angle_n of_o the_o plain_a m_o be_v remove_v 7_o foot_n from_o the_o point_n a_o upon_o the_o line_n a_o g_o wherefore_o i_o will_v reckon_v 17_o paâ—_n begin_n at_o a_o and_o from_o the_o seventeen_o i_o will_v to_o the_o point_n f_o divide_v the_o ray_n a_o g_o at_o the_o point_n r._n from_o this_o pâ—_n r_n we_o must_v draw_v a_o parallel_n to_o the_o base_a and_o by_o reason_n that_o the_o plane_n m_o be_v within_o the_o ray_n a_o g_o a_o foot_n and_o a_o hâ—â—_n we_o must_v upon_o the_o same_o line_n r_n but_o on_o the_o side_n b_o d_o take_v part_n and_o a_o half_a for_o to_o carry_v within_o the_o ray_n a_o g_o why_o h_z shall_v be_v the_o point_n m_o represent_v the_o angle_n of_o the_o plane_n m_o for_o 〈◊〉_d angle_n l_o which_o be_v remove_v 26_o foot_n from_o the_o point_n a._n we_o must_v from_o the_o point_n d_o which_o be_v 24_o foot_n from_o the_o peâ—_n a_o draw_z to_z f_o and_o where_o the_o ray_n a_o g_o shall_v be_v divide_v at_o the_o pointy_a draw_v a_o parallel_n now_o as_o it_o be_v about_o 〈◊〉_d foot_n that_o this_o line_n y_z be_v enough_o remove_v we_o must_v draw_v from_o the_o second_o part_n of_o the_o scale_n to_o the_o point_n g_o aâ—_n where_o this_o ray_n shall_v divide_v the_o parallel_n y._n at_o the_o point_n qui_fw-fr we_o must_v draw_v q_o f_o which_o shall_v give_v upon_o a_o g_o 〈◊〉_d point_n h_n from_o which_o point_n h_n we_o must_v draw_v a_o parallel_n to_o a_o b_o and_o upon_o the_o same_o line_n h_n but_o on_o the_o side_n b_o take_v the_o measure_n for_o to_o gâ—ve_v 13_o foot_n and_o a_o half_a from_o the_o point_n h_n unto_o the_o point_n l._n for_o the_o point_n k_o which_o be_v remove_v 29_o foot_n from_o a_o we_o must_v from_o the_o five_o part_n of_o the_o scale_n a_o d_o draw_z toâ—_n point_n g_o and_o where_o this_o ray_n shall_v divide_v the_o parallel_n y_fw-fr at_o the_o point_n o_o to_o draw_v o_o f_o for_o to_o have_v upon_o a_o g_o 〈◊〉_d point_n n._n then_o from_o the_o point_n n._n to_o draw_v a_o parallel_n for_o to_o take_v on_o the_o side_n b_o d_o 7_o foot_n and_o a_o half_a 〈◊〉_d we_o must_v carry_v out_o of_o the_o ray_n a_o g_o that_o be_v to_o say_v from_z n_z to_z k._n for_o the_o point_n i._o remove_v 38_o foot_n from_o the_o point_n a._n we_o must_v upon_o the_o scale_n a_o d_o take_v 14_o part_n 〈◊〉_d from_o the_o 14_o draw_v a_o ray_n to_o the_o point_n g_o which_o shall_v divide_v the_o parallel_n the_o point_n s._n and_o from_o the_o point_n s_o to_o dâ—_n to_o f_o which_o shall_v divide_v the_o ray_n a_o g_o at_o the_o point_n t_o remove_v 38_o foot_n from_o the_o point_n a_o by_o reason_n tâ—_n the_o parallel_n y_fw-fr be_v of_o 24_o to_o the_o which_o have_v join_v 14._o they_o make_v 38._o at_o the_o point_n t._n and_o by_o reason_n that_o angle_n i_o be_v 4_o foot_n and_o a_o half_a within_o the_o ray_n a_o g_o we_o must_v upon_o this_o parallel_n t_o but_o on_o the_o side_n d_o b_o takâ—_n foot_n and_o a_o half_a and_o carry_v they_o from_o the_o point_n t_o to_o the_o point_n 1_n for_o to_o frame_v the_o plane_n we_o must_v join_v by_o right_a line_n these_o 4_o point_n m_n i_o k_o i_o and_o from_o their_o angle_n raise_v pâ—â—pendicules_a as_o m_n st_o l_o ff_o k_o fr_n and_o i_o sp_z the_o which_o shall_v have_v each_o 17_o foot_n as_o be_v mark_v in_o the_o plane_n by_o 〈◊〉_d â—_o ne_o x_o and_o from_o the_o end_n of_o these_o perpendicular_o to_o draw_v two_o diagonal_n st_o sp_z ff_a fr_n which_o shall_v divide_v themselâ—â—_n in_o z_o and_o upon_o this_o point_n z_o to_o elevate_v a_o perpendicular_a z_o ae_n of_o 13_o foot_n and_o a_o half_a then_o to_o draw_v line_n 〈◊〉_d all_o the_o four_o corner_n sl_z ff_n sp_z and_o fr_n to_o the_o point_n ae_n and_o the_o cage_n shall_v be_v frame_v in_o perspective_n if_o one_o will_v 〈◊〉_d it_o descend_v within_o the_o ground_n one_o foot_n we_o must_v adjoyn_v one_o foot_n under_o every_o point_n of_o the_o plane_n and_o join_v thâ—_n together_o with_o line_n for_o to_o give_v just_o the_o distance_n remove_v the_o point_n remain_v in_o the_o picture_n those_o that_o will_v use_v this_o common_a manner_n must_v know_v that_o the_o number_n of_o foot_n that_o we_o shall_v take_v upon_o the_o base_a aught_o to_o have_v respect_n to_o the_o distance_n that_o they_o shall_v have_v determine_v of_o for_o to_o cause_v my_o proposition_n to_o be_v understand_v i_o will_v set_v in_o the_o first_o figure_n two_o distance_n the_o one_o of_o six_o foot_n the_o other_o of_o twelve_o which_o have_v respect_v the_o one_o to_o the_o other_o by_o reason_n that_o divide_v into_o two_o each_o of_o the_o six_o part_n we_o shall_v have_v twelve_o let_v we_o suppose_v then_o that_o the_o line_n a_o b_o be_v divide_v into_o twelve_o part_n and_o that_o from_o all_o these_o part_n one_o have_v draw_v ray_n to_o the_o point_n of_o sight_n c_o let_v we_o take_v now_o the_o half_a of_o these_o division_n a_o d_o and_o draw_v to_o the_o point_n e_o which_o be_v the_o distance_n of_o 6_o foot_n it_o be_v certain_a that_o the_o section_n of_o the_o ray_n a_o c_o shall_v be_v the_o abridgement_n of_o the_o square_n view_v six_o foot_n distant_a if_o from_o the_o point_n d_o we_o draw_v to_o the_o point_n f_o which_o be_v the_o distance_n of_o twelve_o foot_n this_o line_n d_o f_o divide_v the_o ray_n a_o c_o shall_v give_v the_o abridgement_n of_o six_o little_a square_n view_v twelve_o foot_n distance_n he_o that_o will_v have_v the_o abridgement_n of_o twelve_o square_n view_v twelve_o foot_n distant_a he_o must_v from_o the_o point_n b_o which_o be_v the_o whole_a base_a draw_v to_o the_o point_n f_o and_o at_o the_o section_n of_o the_o ray_n a_o c_o to_o the_o point_n h_n shall_v be_v that_o which_o be_v require_v 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we_o must_v set_v the_o measure_n for_o the_o travers_n as_o o_o shall_v be_v for_o the_o bar_v below_o p_o for_o the_o bar_n of_o the_o seat_n and_o q_n shall_v be_v for_o the_o back_n of_o the_o chair_n all_o be_v dispose_v thus_o we_o must_v from_o the_o angle_n of_o the_o plane_n draw_v parallel_n to_o the_o base_a unto_o the_o line_n of_o elevation_n and_o at_o the_o section_n to_o elevate_v perpendicules_n which_o shall_v give_v the_o measure_n as_o we_o have_v say_v of_o other_o figure_n heretofore_o all_o the_o line_n of_o the_o side_n ought_v to_o draw_v to_o the_o point_n accidental_a of_o the_o plane_n for_o example_n in_o the_o chair_n of_o the_o midst_n all_o the_o side_n ought_v to_o draw_v to_o the_o point_n g_o which_o be_v the_o point_n of_o the_o plane_n as_o i_o make_v it_o to_o be_v see_v in_o the_o figure_n of_o movable_n lie_v or_o throw_v upon_o the_o ground_n from_o the_o same_o plane_n of_o the_o chair_n aforego_v which_o be_v upon_o their_o foot_n it_o be_v 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draw_v to_o the_o point_n of_o sight_n e_o and_o to_o observe_v where_o they_o shall_v divide_v the_o occult_a perpendicular_o for_o to_o make_v by_o these_o point_v a_o crooked_a line_n which_o shall_v give_v the_o round_n in_o perspective_n if_o instead_o of_o these_o lace_n and_o of_o the_o round_a there_o be_v a_o embroidery_n we_o shall_v use_v the_o same_o order_n for_o to_o abbreviate_v it_o in_o the_o figure_n below_o i_o have_v make_v the_o same_o altar_n without_o line_n and_o adorn_v with_o a_o cross_n and_o two_o candlestick_n for_o to_o find_v the_o place_n of_o these_o candlestick_n we_o must_v prolong_v the_o line_n of_o the_o corner_n of_o the_o altar_n as_o be_v q_n r_o then_o from_o the_o distance_n g_o draw_v a_o line_n by_o the_o corner_n of_o the_o altar_n t_o and_o to_o continue_v it_o until_o that_o it_o divide_v that_o q_o r_o and_o this_o line_n q_o r_o shall_v be_v the_o length_n of_o the_o altar_n equal_a to_o b_o f_o of_o the_o first_o figure_n upon_o the_o 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