Note: this document has content that may require expanded/print view for best results (icons above right)
Thomas Jefferson: Measures of a Roof for Estimating Tin, 5 July 1822, 5 July 1822
Measures of the roof for estimating tin July 5. 22.
N.E. quarter beginning with the piazzo roof, 5 planes to N.E. Brh’s
| top line | bottom line | half | height | sq. f | squares | boxes tin | |
| 1. | 21–6 | 9–0 | 15–3 | 11–2 | 170.25 | 1.70 | |
| 2. | 9–0 | 7–2 | 8–1 | 17–3 | 140. | 1.40 | |
| 3. | 0–0 | 7–0 | 3–6 | 20–4 | 71. | .71 | |
| 4. | 29–6 | 27–6 | 28–6 | 16–0 | 456. | 4.56 | |
| 5. | 25–0 | 11–6 | 18–3 | 14 | 255. | 2.55 | box D D |
| 10.92 | 8x13=104 |
| box | squares | ||||||||
| the 4. quarters of roof | 11 x4 | = | 44 | ||||||
| the dome | 3¾ | = | 3¾ | boxes | D | D. | |||
| 47¾ | = | 32 | @ | 13. | = | 416 |
Note a box of tin contains about 225. sheets 13¼I by 10⅛I=11/12 of a foot
Dome.
| top line | bottom | half | height | sq. f | squares | squares | boxes | |
| [. . .] sides. | 7–2 | 11–7 | 9–4½ | 6–0 | 54. | .54 x | 2=1.08 | |
| 6. sides | 5–6 | 9–3 | 7–4½ | 6–0 | 44.25 | .44¼x | 6=2.65 | |
| . | 3.73 | 2½ |
CSmH: Jefferson File.