TABLE OF THE SPECIFIC GRAVITIES OF SOLUTIONS OF CAUSTIC SODA.
| | Per cent. by weight of | Lb. of actual NaOH contained in 1 gallon of lye made from commercial caustic of | | Degrees Twaddell. | Specific gravity. | Na2O. | NaOH. | 77 per cent. | 74 per cent. | 70 per cent. | | 49 | 1.245 | 17.060 | 22.008 | 2.739 | 2.615 | 2.474 | | 50 | 1.250 | 17.424 | 22.476 | 2.809 | 2.681 | 2.536 | | 51 | 1.255 | 17.800 | 22.962 | 2.881 | 2.750 | 2.602 | | 52 | 1.260 | 18.166 | 23.433 | 2.952 | 2.818 | 2.666 | | 53 | 1.265 | 18.529 | 23.901 | 3.020 | 2.886 | 2.730 | | 54 | 1.270 | 18.897 | 24.376 | 3.095 | 2.955 | 2.795 | | 55 | 1.275 | 19.255 | 24.858 | 3.171 | 3.027 | 2.863 | | 56 | 1.280 | 19.609 | 25.295 | 3.237 | 3.090 | 2.932 | | 57 | 1.285 | 19.961 | 25.750 | 3.308 | 3.158 | 2.988 | | 58 | 1.290 | 20.318 | 26.210 | 3.381 | 3.227 | 3.053 | | 59 | 1.295 | 20.655 | 26.658 | 3.452 | 3.364 | 3.117 | | 60 | 1.300 | 21.156 | 27.110 | 3.524 | 3.394 | 3.182 | | 61 | 1.305 | 21.405 | 27.611 | 3.603 | 3.439 | 3.253 | | 62 | 1.310 | 21.785 | 28.105 | 3.682 | 3.514 | 3.224 | | 63 | 1.315 | 22.168 | 28.595 | 3.760 | 3.593 | 3.395 | | 64 | 1.320 | 22.556 | 29.161 | 3.849 | 3.674 | 3.475 | | 65 | 1.325 | 22.926 | 29.574 | 3.919 | 3.742 | 3.539 | | 66 | 1.330 | 23.310 | 30.058 | 3.997 | 3.816 | 3.610 | | 67 | 1.335 | 23.670 | 30.535 | 4.072 | 3.891 | 3.681 | | 68 | 1.340 | 24.046 | 31.018 | 4.156 | 3.967 | 3.754 | | 69 | 1.345 | 24.410 | 31.490 | 4.232 | 4.042 | 3.824 | | 70 | 1.350 | 24.765 | 31.948 | 4.312 | 4.116 | 3.894 | | 71 | 1.355 | 25.152 | 32.446 | 4.396 | 4.196 | 3.970 | | 72 | 1.360 | 25.526 | 32.930 | 4.478 | 4.274 | 4.043 | | 73 | 1.365 | 25.901 | 33.415 | 4.561 | 4.354 | 4.109 | | 74 | 1.370 | 26.285 | 33.905 | 4.645 | 4.434 | 4.194 | | 75 | 1.375 | 26.650 | 34.382 | 4.728 | 4.513 | 4.269 | | 76 | 1.380 | 27.021 | 34.855 | 4.810 | 4.592 | 4.344 | | 77 | 1.385 | 27.385 | 35.328 | 4.893 | 4.670 | 4.418 | | 78 | 1.390 | 27.745 | 35.795 | 4.975 | 4.794 | 4.493 | | 79 | 1.395 | 28.110 | 36.258 | 5.058 | 4.828 | 4.567 | | 80 | 1.400 | 28.465 | 36.720 | 5.141 | 4.907 | 4.642 | | 81 | 1.405 | 28.836 | 37.203 | 5.227 | 4.989 | 4.720 | | 82 | 1.410 | 29.203 | 37.674 | 5.312 | 5.071 | 4.797 | | 83 | 1.415 | 29.570 | 38.146 | 5.397 | 5.135 | 4.873 | | 84 | 1.420 | 29.930 | 38.610 | 5.482 | 5.233 | 4.950 | | 85 | 1.425 | 30.285 | 39.071 | 5.567 | 5.314 | 5.027 | | 86 | 1.430 | 30.645 | 39.530 | 5.653 | 5.396 | 5.104 | | 87 | 1.435 | 30.995 | 39.986 | 5.738 | 5.467 | 5.181 | | 88 | 1.440 | 31.349 | 40.435 | 5.823 | 5.558 | 5.258 | | 89 | 1.445 | 31.700 | 40.882 | 5.908 | 5.640 | 5.335 | | 90 | 1.450 | 32.043 | 41.335 | 5.923 | 5.721 | 5.412 | | 91 | 1.455 | 32.460 | 41.875 | 6.093 | 5.816 | 5.502 | | 92 | 1.460 | 32.870 | 42.400 | 6.191 | 5.909 | 5.608 | | 93 | 1.465 | 33.283 | 42.935 | 6.290 | 6.004 | 5.679 | | 94 | 1.470 | 33.695 | 43.467 | 6.389 | 6.009 | 5.769 | | 95 | 1.475 | 34.092 | 43.980 | 6.487 | 6.193 | 5.856 | | 96 | 1.480 | 34.500 | 44.505 | 6.586 | 6.287 | 5.948 | | 97 | 1.485 | 34.899 | 45.013 | 6.685 | 6.381 | 6.035 | | 98 | 1.490 | 35.245 | 45.530 | 6.784 | 6.476 | 6.126 | | 99 | 1.495 | 35.691 | 46.041 | 6.884 | 6.571 | 6.216 | | 100 | 1.500 | 36.081 | 46.545 | 6.982 | 6.665 | 6.303 | (From Soaps, by G. H. Hurst, published by Scott, Greenwood & Son.)
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