Appendix D
Table of Strength of Caustic Potash Solutions at 60° F.
| Specific gravity. | Degrees Twaddell. | Per cent. KOH. | Lb. of KOH per gal. |
| 1.060 | 12 | 5.59 | 0.59 |
| 1.110 | 22 | 11.31 | 1.25 |
| 1.150 | 30 | 15.48 | 1.77 |
| 1.190 | 38 | 19.29 | 2.21 |
| 1.230 | 46 | 23.22 | 2.84 |
| 1.280 | 56 | 27.87 | 3.56 |
| 1.330 | 66 | 31.32 | 4.16 |
| 1.360 | 72 | 35.01 | 4.76 |
| 1.390 | 78 | 38.59 | 5.36 |
| 1.420 | 84 | 40.97 | 5.81 |
| 1.440 | 88 | 43.83 | 6.31 |
| 1.470 | 94 | 47.16 | 6.93 |
| 1.520 | 104 | 51.09 | 7.76 |
| 1.600 | 112 | 55.62 | 8.89 |
| 1.680 | 136 | 60.98 | 10.24 |
| 1.780 | 156 | 67.65 | 12.04 |
| 1.880 | 176 | 75.74 | 14.23 |
| 2.000 | 200 | 86.22 | 17.24 |
(From Soaps, by G. H. Hurst, published by Scott, Greenwood & Son.)
The End