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as_o you_o may_v see_v if_o you_o place_v the_o visual_a point_n at_o m_o and_o delineate_v the_o same_o circle_n scenographical_o as_o d_o it_o become_v big_a in_o length_n and_o breadth_n for_o the_o visual_a ray_n be_v elevate_v the_o several_a perpendicular_o erect_v on_o the_o glass_n intersect_v they_o in_o wide_a distance_n because_o further_o from_o the_o glass_n as_o you_o may_v see_v in_o the_o scenographick_a circle_n d._n three_o if_o this_o glass_n be_v set_v oblique_a to_o the_o plain_a the_o figure_n will_v again_o alter_v for_o if_o it_o incline_v to_o the_o visual_a point_n the_o scenographick_a appearance_n of_o this_o circle_n for_o example_n shall_v on_o the_o glass_n lengthen_v between_o the_o visual_a point_n and_o the_o object_n because_o the_o plain_a of_o the_o glass_n gather_v in_o more_o of_o the_o visual_a ray_n and_o if_o the_o glass_n recline_v from_o the_o visual_a point_n the_o scenographick_a appearance_n shall_v grow_v round_a and_o more_o like_o the_o 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all_o line_n that_o in_o the_o object_n or_o geometric_a figure_n be_v straight_a line_n be_v in_o scenographie_n also_o straight_o line_n 2._o all_o line_n that_o in_o a_o geometric_a figure_n be_v perpendicular_o must_v in_o scenographie_n also_o be_v perpendicular_o 3._o all_o line_n that_o in_o a_o geometric_a figure_n be_v parallel_n to_o its_o base_a must_v in_o scenographie_n be_v also_o parallel_v to_o the_o base_a 4._o all_o line_n that_o in_o geometric_a figure_n return_v at_o right_a angle_n from_o the_o orthographick_n or_o foreright_o side_n must_v in_o scenographick_a figure_n be_v draw_v from_o the_o visual_a point_n 5._o all_o right_a line_n that_o in_o a_o geometric_a figure_n return_v from_o the_o orthographick_n or_o foreright_o side_n in_o a_o scenographick_a figure_n run_v into_o the_o horizontal_n line_n and_o 6._o all_o line_n that_o in_o the_o geometric_a figure_n be_v parallel_n to_o that_o return-line_n shall_v in_o a_o scenographick_a figure_n be_v draw_v from_o that_o point_n find_v in_o the_o horizon_n 7._o if_o a_o right_a angle_n have_v one_o of_o its_o side_n against_o the_o base_a be_v to_o be_v cut_v off_o so_o as_o the_o two_o side_n of_o it_o shall_v remain_v equal_a then_o a_o line_n draw_v from_o the_o point_n of_o distance_n shall_v so_o cut_v it_o off_o 8._o if_o the_o figure_n you_o design_v to_o draw_v stand_v on_o your_o right_a hand_n you_o must_v place_v it_o on_o the_o right_a hand_n of_o the_o visual_a point_n if_o on_o your_o left_a hand_n you_o must_v place_v it_o on_o the_o left_a hand_n of_o the_o visual_a point_n but_o if_o on_o neither_o hand_n the_o visual_a point_n must_v be_v place_v in_o the_o middle_n of_o it_o 9_o if_o you_o set_v off_o the_o height_n of_o column_n post_n or_o other_o thing_n you_o must_v measure_v the_o design_a height_n from_o the_o base-line_n upward_o in_o the_o front_n or_o orthography_n and_o a_o visual_a ray_n draw_v from_o that_o point_n in_o the_o front_n shall_v show_v the_o height_n of_o your_o column_n or_o post_n all_o the_o way_n behind_o the_o orthography_n even_o to_o the_o visual_a point_n as_o in_o oper._n xxix_o etc._n etc._n this_o be_v a_o rule_n in_o all_o figure_n aswell_o wherein_o there_o be_v a_o orthographick_a side_n place_v before_o it_o as_o where_o there_o be_v none_o 10._o if_o you_o be_v to_o make_v circle_n arch_n cross_n cross-arche_n or_o any_o other_o figure_n in_o the_o roof_n of_o any_o room_n you_o must_v first_o project_v the_o same_o on_o the_o ichnographie_n and_o so_o with_o perpendicular_o from_o the_o eminent_a point_n of_o the_o same_o carry_v it_o up_o into_o the_o ceiling_n as_o in_o oper._n 20_o 21_o 22_o 23_o 24_o 25_o 26_o 27_o etc._n etc._n and_o then_o from_o those_o several_a point_n carry_v on_o your_o circle_n or_o arch_n etc._n etc._n as_o in_o oper._n 9_o 10_o 11_o 12_o 13_o 25_o 26_o etc._n etc._n 11._o if_o you_o will_v find_v the_o middle_a point_n of_o any_o scenographick_n square_a cross_v it_o in_o 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etc._n etc._n you_o be_v leave_v to_o your_o discretion_n for_o make_v they_o either_o slender_a or_o stub_a thick_a or_o thin_a of_o leave_n etc._n etc._n because_o it_o will_v be_v endless_a in_o draw_v they_o by_o proportion_n partly_o for_o the_o multiplicity_n of_o part_n in_o every_o tree_n etc._n etc._n and_o partly_o because_o the_o season_n of_o the_o year_n alter_v their_o appearance_n 5._o in_o colour_v and_o shadow_v those_o object_n that_o lie_v near_o the_o ay_o you_o be_v to_o make_v of_o the_o same_o colour_n in_o your_o picture_n they_o be_v in_o the_o object_n only_o as_o they_o run_v from_o the_o ey_fw-mi they_o must_v be_v make_v faint_a and_o faint_a till_o at_o last_o they_o all_o loose_v themselves_o in_o a_o dark_a sky_n colour_n operation_n l._n to_o draw_v building_n that_o be_v posit_v oblique_o to_o the_o horizontal_n line_n place_v your_o geometric_a ichnographie_n in_o what_o position_n you_o think_v good_a as_o here_o a_o b_o c_o d_o which_o reduce_v to_o 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to_o run_v as_o at_o defghiklm_n which_o be_v one_o half_a of_o the_o scenographick_a ground_n the_o other_o scenographick_a semicircle_n be_v draw_v through_o the_o intersection_n of_o the_o diametral_n with_o the_o parallel_n in_o the_o under_o half_a of_o the_o scenographick_a ground_n operation_n xi_o height_n and_o distance_n give_v to_o draw_v the_o perspective_n of_o a_o flat_a oval_n divide_v the_o circumference_n of_o the_o oval_a into_o so_o many_o equal_a part_n as_o you_o please_v the_o more_o the_o better_o in_o this_o example_n we_o have_v 16_o and_o mark_v they_o with_o 1_o 2_o 3_o 4_o 5_o etc._n etc._n from_o these_o point_n raise_v perpendicular_o into_o the_o base_a and_o transfer_v the_o distance_n of_o each_o perpendicular_a from_o the_o lace_z to_o the_o base_a then_o from_o the_o point_n of_o distance_n c_o draw_z diametral_n to_o the_o several_a perpendicular_o in_o the_o base_a and_o diagonal_o to_o the_o transfer_v distance_n of_o those_o perpendicular_o and_o 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to_o pass_v that_o when_o these_o face_n on_o the_o crystal_n be_v turn_v towards_o a_o plain_a place_v direct_o before_o it_o these_o face_n of_o the_o crystal_n dis-seve_a themselves_o at_o a_o considerable_a distance_n on_o the_o plain_a because_o they_o be_v all_o direct_v to_o several_a remote_a part_n of_o that_o plain_a now_o though_o there_o have_v not_o as_o yet_o be_v any_o geometric_a rule_n find_v for_o the_o assign_v a_o place_n on_o the_o plain_a of_o each_o of_o these_o face_n yet_o be_v there_o find_v how_o they_o may_v be_v place_v on_o a_o plain_a as_o you_o shall_v learn_v by_o the_o next_o operation_n operation_n lx._n how_o among_o a_o great_a many_o picture_n on_o the_o plain_a to_o see_v one_o elect_v and_o peculiar_a picture_n quite_o different_a from_o any_o on_o the_o plain_a have_v fix_v your_o plain_n fast_o and_o also_o fix_v your_o tube_n fast_o direct_o before_o the_o plain_a look_v through_o the_o little_a hole_n at_o the_o hither_o end_n of_o the_o tube_n and_o with_o a_o point_n or_o black-lead_a pencil_n mark_v where_o the_o several_a angle_n of_o each_o and_o every_o face_n of_o the_o crystal_n fall_v upon_o the_o plain_a so_o may_v you_o with_o your_o black-lead_a pencil_n draw_v a_o line_n by_o the_o side_n of_o a_o ruler_n from_o point_n to_o point_n of_o each_o face_n thus_o find_v on_o your_o plain_n but_o you_o must_v remember_v to_o mark_v each_o face_n on_o your_o plain_n with_o numerical_a figure_n or_o some_o other_o mark_n so_o as_o you_o may_v know_v to_o what_o face_n of_o your_o crystal_n each_o belong_v for_o you_o will_v find_v they_o all_o revert_v that_o be_v those_o see_v through_o the_o top-face_n of_o your_o crystal_n will_v be_v in_o the_o bottom_n of_o your_o plain_n and_o those_o see_v through_o the_o right_a hand_n face_n of_o your_o crystal_n will_v be_v on_o the_o left_a hand_n on_o your_o plain_n have_v thus_o prepare_v your_o plain_n you_o must_v draw_v the_o figure_n of_o your_o crystal_n on_o a_o plain_a paper_n exact_o of_o the_o size_n of_o your_o crystal_n and_o divide_v it_o into_o so_o many_o part_n your_o crystal_n be_v divide_v and_o cut_v into_o face_n and_o mark_v each_o division_n thereon_o in_o a_o revert_v order_n from_o that_o on_o your_o plain_n as_o if_o the_o bottom_n face_n on_o your_o plain_n be_v mark_v 1_o then_o mark_v the_o top_n face_n in_o your_o paper_n 1_o and_o if_o 2_o 3_o 4_o etc._n etc._n be_v mark_v towards_o the_o right_a hand_n on_o your_o plain_n mark_v they_o towards_o your_o left_a hand_n on_o your_o paper_n as_o you_o see_v in_o the_o figure_n on_o this_o paper_n therefore_o you_o must_v draw_v the_o picture_n you_o intend_v shall_v be_v see_v on_o the_o plain_a suppose_v the_o picture_n of_o king_n charles_n the_o first_o and_o have_v draw_v it_o transfer_v all_o the_o lineament_n and_o stroke_n you_o find_v in_o each_o respective_a face_n on_o the_o paper_n to_o the_o responding_z face_n on_o the_o plain_a as_o for_o example_n what_o lineament_n you_o find_v in_o the_o face_n mark_v 1_o on_o the_o paper_n transfer_v to_o the_o face_n mark_v 1_o on_o the_o plain_a what_o lineament_n you_o find_v in_o the_o face_n mark_v 2_o on_o the_o paper_n transfer_v to_o the_o face_n mark_v 2_o on_o the_o plain_a and_o so_o for_o all_o the_o rest_n then_o look_v again_o through_o your_o tube_n you_o will_v see_v all_o the_o sever_a face_n on_o the_o plain_n unite_v each_o face_n contribute_v the_o lineament_n draw_v in_o it_o to_o form_v your_o intend_a picture_n of_o if_o you_o have_v a_o mind_n further_a to_o amuse_v spectator_n you_o may_v to_o every_o one_o of_o the_o face_n on_o the_o plain_n draw_v another_o picture_n as_o in_o the_o face_n mark_v 10_o on_o the_o plain_a you_o find_v a_o ey_fw-mi to_o this_o ey_fw-mi make_v up_o a_o whole_a figure_n to_o the_o face_n mark_v 12_o you_o find_v the_o mouth_n to_o this_o make_v up_o another_o whole_a figure_n etc._n etc._n but_o you_o may_v alter_v the_o likeness_n as_o much_o as_o you_o list_v both_o in_o countenance_n and_o dress_v so_o will_v the_o conceit_n appear_v yet_o so_o much_o the_o stranger_n i_o have_v insert_v one_o example_n where_o about_o the_o face_n 1_o on_o the_o plain_a i_o have_v set_v the_o picture_n of_o a_o woman_n i_o two_o iii_o four_o five_o vi_o vii_o viii_o ix_o x_o xi_o xii_o xiii_o xiiii_o xv_o xvi_o xvii_o xviii_o xix_o xx_o xxi_o xxii_o xxiii_o xxiiii_o xxv_o xxvi_o xxvii_o xxviii_o xxix_o xxx_o xxxi_o xxxii_o xxxiii_o xxxiiii_o xxxv_o xxxvi_o xxxvii_o xxxviii_o thirty-nine_o xl_o xli_o xlii_o xliii_o xliiii_o xlv_o xlvi_o xlvii_o xlviii_o xlix_o l_o li_n li_n lii_o liii_o liiii_o lv_o lvi_o lvii_o lvii_o lviii_o lxi_o lx_o