[161.] Operation.

[162.] Method III.

[163.] Remarks.

[164.] CHAP. VII. Of Shadows.

[165.] Of Solar Shadows. Problem I.

[166.] Operation.

[167.] Proe. II.

[168.] Remarks.

[169.] Problem III.

[170.] Of the Shadows of a ſmall Light. Prob. IV.

[171.] Problem V.

[172.] Remarks.

[173.] CHAP. VIII. Of mechanically ſhortning the Operations of Perſpective. 1. WHEN the perſpective Plane is ſup-pos’d perpendicular or upright. Problem I.

[174.] Operation.

[175.] Method II.

[176.] Prob. II.

[177.] Operation.

[178.] Method II.

[179.] Method III.

[180.] The Demonſtration of the two laſt Ways.

[181.] II. When the Perſpective Plane is inclined. Prob. III.

[182.] Prob. IV.

[183.] Remarks.

[184.] III. When the Perſpective Plane is Parallel or Horizontal. Prob. V.

[185.] Operation.

[186.] Demonstration.

[187.] Remarks.

[188.] Prob. VI.

[189.] Demonstration.

[190.] Prob. VII.