| Lecture VII. | Given a line on the ground, neither parallel nor perpendicular to the picture, to find its length, and angle with the picture, its vanishing and measuring points by plan and elevation. To draw a line on the ground, making any angle with the picture. |
| VIII. | Rectangular solids on the ground at a given angle with the picture. |
| IX. | Polygonal solids; axis horizontal or vertical, |
| X. | Solids combining curved and right lines, |
| XI. | Given the plan and elevation of any solid, to find its perspective representation. |
| XII. | Given three points on the ground, to find the length of the lines joining them, and the degrees in each angle; inclined lines in space, their length, and the planes containing them; accidental vanishing points. |
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