SHRINKAGE OF CASTINGS.
| Cast Iron, | ⅛ inch | per lineal foot. |
| Brass, | ³/₁₆ inch | per lineal foot. |
| Lead, | ⅛ inch | per lineal foot. |
| Tin, | ¹/₁₂ inch | per lineal foot. |
| Zinc, | ⁵/₁₆ inch | per lineal foot. |
WEIGHT OF ROUND AND SQUARE
ROLLED IRON PER LINEAL FOOT.
| Inch. | Round. | Square. |
|---|---|---|
| ¼ | .165 | .211 |
| ⅜ | .373 | .475 |
| ½ | .663 | .845 |
| ⅝ | 1.043 | 1.320 |
| ¾ | 1.493 | 1.901 |
| ⅞ | 2.032 | 2.588 |
| 1 | 2.654 | 3.380 |
| 1⅛ | 3.359 | 4.278 |
| 1¼ | 4.147 | 5.280 |
| 1⅜ | 5.019 | 6.390 |
| 1½ | 5.972 | 7.604 |
| 1⅝ | 7.010 | 8.926 |
| 1¾ | 8.128 | 10.352 |
| 1⅞ | 9.333 | 11.883 |
| 2 | 10.616 | 13.520 |
| 2⅛ | 11.988 | 15.263 |
| 2¼ | 13.440 | 17.112 |
| 2⅜ | 14.975 | 19.066 |
| 2½ | 16.588 | 21.120 |
| 2⅝ | 18.293 | 23.292 |
| 2¾ | 20.076 | 25.560 |
| 2⅞ | 21.944 | 27.939 |
| 3 | 23.888 | 30.416 |
| 3¼ | 28.040 | 35.704 |
| 3½ | 32.512 | 41.408 |
| 3¾ | 37.332 | 47.534 |
| 4 | 42.464 | 54.084 |
| 4¼ | 47.952 | 61.055 |
| 4½ | 53.760 | 68.448 |
| 4¾ | 59.900 | 76.264 |
| 5 | 66.350 | 84.480 |
| 5¼ | 73.172 | 93.168 |
| 5½ | 80.304 | 102.24 |
| 5¾ | 87.776 | 111.75 |
| 6 | 95.552 | 121.66 |
| 6¼ | 103.70 | 132.04 |
| 6½ | 112.16 | 142.81 |
| 6¾ | 120.96 | 154.01 |
| 7 | 130.04 | 165.63 |
| 7¼ | 139.54 | 177.67 |
| 7½ | 149.32 | 190.13 |
| 7¾ | 159.45 | 203.02 |
| 8 | 169.85 | 216.33 |
| 8¼ | 180.69 | 230.06 |
| 8½ | 191.80 | 244.22 |
| 8¾ | 203.26 | 258.80 |
| 9 | 215.04 | 273.79 |
| 9¼ | 227.15 | 289.22 |
| 9½ | 239.60 | 305.056 |
| 9¾ | 252.37 | 321.33 |
| 10 | 265.40 | 337.92 |
| 10¼ | 278.92 | 355.30 |
| 10½ | 292.68 | 372.70 |
| 10¾ | 306.80 | 390.80 |
| 11 | 321.21 | 409.00 |
| 12 | 382.20 | 486.70 |
TABLE OF THE CAPACITY
OF CISTERNS IN GALLONS
For Each 10 Inches of Depth.
| Diam. in Feet. | Gallons. |
|---|---|
| 2 | 19.5 |
| 2½ | 30.6 |
| 3 | 44.06 |
| 3½ | 59.97 |
| 4 | 78.33 |
| 4½ | 99.14 |
| 5 | 122.40 |
| 5½ | 148.10 |
| 6 | 176.25 |
| 6½ | 206.85 |
| 7 | 239.88 |
| 7½ | 275.40 |
| 8 | 313.33 |
| 8½ | 353.72 |
| 9 | 396.56 |
| 9½ | 461.4 |
| 10 | 489.2 |
| 11 | 592.4 |
| 12 | 705.0 |
| 13 | 827.4 |
| 14 | 959.6 |
| 15 | 1101.6 |
| 20 | 1958.4 |
| 25 | 3059.9 |
The American Standard gallon contains 231 cubic inches, or 8⅓ pounds of pure water. A cubic foot contains 62.3 pounds of water, or 7.48 gallons. Pressure per square inch is equal to the depth or head in feet multiplied by .433. Each 27.72 inches of depth gives a pressure of one pound to the square inch.