| |
| | | Per cent. by | Lb. of actual NaOH contained |
| | | weight of | in 1 gallon of lye made from |
| | | | commercial caustic of |
| Degrees | Specific |___________________|______________________________|
| Twaddell. | gravity. | | | | | |
| | | Na_{2}O. | NaOH. | 77 per | 74 per | 70 per |
| | | | | cent. | cent. | cent. |
|___________|__________|__________|________|_________|_________|__________|
| | | | | | | |
| 1 | 1.005 | 0.368 | 0.474 | 0.048 | 0.046 | 0.043 |
| 2 | 1.010 | 0.742 | 0.957 | 0.097 | 0.092 | 0.087 |
| 3 | 1.015 | 1.114 | 1.436 | 0.146 | 0.131 | 0.129 |
| 4 | 1.020 | 1.480 | 1.909 | 0.194 | 0.185 | 0.180 |
| 5 | 1.025 | 1.834 | 2.365 | 0.243 | 0.231 | 0.219 |
| 6 | 1.030 | 2.194 | 2.830 | 0.291 | 0.278 | 0.262 |
| 7 | 1.035 | 2.521 | 3.252 | 0.335 | 0.320 | 0.303 |
| 8 | 1.040 | 2.964 | 3.746 | 0.389 | 0.371 | 0.350 |
| 9 | 1.045 | 3.244 | 4.184 | 0.438 | 0.417 | 0.393 |
| 10 | 1.050 | 3.590 | 4.631 | 0.486 | 0.461 | 0.438 |
| 11 | 1.055 | 3.943 | 5.086 | 0.536 | 0.510 | 0.483 |
| 12 | 1.060 | 4.292 | 5.536 | 0.586 | 0.558 | 0.528 |
| 13 | 1.065 | 4.638 | 5.982 | 0.636 | 0.607 | 0.573 |
| 14 | 1.070 | 4.972 | 6.413 | 0.680 | 0.653 | 0.617 |
| 15 | 1.075 | 5.311 | 6.911 | 0.742 | 0.707 | 0.668 |
| 16 | 1.080 | 5.648 | 7.285 | 0.786 | 0.749 | 0.709 |
| 17 | 1.085 | 5.981 | 7.715 | 0.836 | 0.798 | 0.755 |
| 18 | 1.090 | 6.311 | 8.140 | 0.886 | 0.845 | 0.800 |
| 19 | 1.095 | 6.639 | 8.564 | 0.937 | 0.894 | 0.846 |
| 20 | 1.100 | 6.954 | 8.970 | 0.986 | 0.941 | 0.890 |
| 21 | 1.105 | 7.276 | 9.386 | 1.037 | 0.989 | 0.938 |
| 22 | 1.110 | 7.594 | 9.796 | 1.087 | 1.037 | 0.981 |
| 23 | 1.115 | 7.910 | 10.203 | 1.137 | 1.123 | 1.026 |