This section is from the "Encyclopedia Of Practical Receipts And Processes" book, by William B. Dick. Also available from Amazon: Dick's encyclopedia of practical receipts and processes.
Tables of Weights, Measures, etc. The following tables have been compiled for the purpose of aiding the reader to determine with facility, the relative values of different weights and measures ; and to furnish in a convenient group a mass of valuable information that would otherwise have to be sought for in a number of volumes not easy of access. Most of the tables have been made expressly for this work, and all of them have been carefully recalculated, revised, and corrected by a competent mathematician.
5935. Avoirdupois Weight is employed for weighing all goods, except those for which Troy or Apothecaries weight are used. The ton is subdivided into hundredweights, quarters, pounds, ounces, and drachms. (See No. 6031 (English Weights and Measures).') Some goods are sold by the hundred-weight of 100 pounds, instead of the hundred-weight (cwt.) of 112 pounds; a ton composed of 20 hundreds would then contain only 2000 pounds. The pound avoirdupois consists of 7000 Troy grains. The drachm avoirdupois is therefore 27.34375 Troy grains. The standard avoirdupois pound of the United States is the weight of 27.7015 cubic inches of distilled water, at 39.83° Fahr., the barometer being at 30 inches.
Ton. Cwt. Qrs. Lbs. | Oz. Dr. |
1 = 20 = 80 = 2,240 = | = 35,840 = 573,440 |
1= 4= 112 = | = 1,792 = 28,672 |
1 = 28 = | 448 = 7,168 |
1 = | 16 = 256 |
1 = 16 | |
5936. Equivalents | of Avoirdupois |
in Troy Weight. | |
Avoirdupois. Lbs. | Oz. Dwt. Grains. |
1 Ton = 2922 | 2 13 8 |
1 Cwt. = 146 | 1 6 16 |
1 Qr. = 34 | 0 6 16 |
1 Lb. = 1 | 2 11 16 |
1 Oz. = | 18 51/2 |
1 Dr. = | 1 311/32 |
5939. Decimal Equivalents of lbs., qrs., and cwt.

qrs. lbs. cwt. | qrs. lbs. cwt. | qrs. lbs. cwt. | qrs. lbs. cwt. |
0 0i=.0044 | 1 0=.25 | 2 0=.5 | 3 0=.75 |
0 1 .0089 | 1 1 .2589 | 2 1 .5089 | 3 1 .7589 |
0 2 .0178 | 1 2 .2678 | 2 2 .5178 | 3 2 .7678 |
0 3 .0268 | 1 3 .2768 | 2 3 .5268 | 3 3 .7768 |
0 4 .0357 | 1 4 .2857 | 2 4 .5357 | 3 4 .7857 |
0 5 .0446 | 1 5 .2946 | 2 5 .5446 | 3 5 .7946 |
0 6 .0535 | 1 6 .3035 | 2 6 .5535 | 3 6 .8035 |
0 7 .0625 | 1 7 .3125 | 2 7 .5625 | 3 7 .8125 |
0 8 .0714 | 1 8 .3214 | 2 8 .5714 | 3 8 .8214 |
0 9 .0803 | 1 9 .3303 | 2 9 .5803 | 3 9 .8303 |
0 10 .0892 | 1 10 .3392 | 2 10 .5892 | 3 10 .8392 |
0 11 .0982 | 1 11 .3482 | 2 11 .5982 | 3 11 .8482 |
0 12 .1071 | 1 12 .3571 | 2 12 .6077 | 3 12 .8571 |
0 13 .1160 | 1 13 .3660 | 2 13 .6160 | 3 13 .8660 |
0 14 .125 | 1 14 .375 | 2 14 .625 | 3 14 .875 |
0 15 .1339 | 1 15 .3839 | 2 15 .6339 | 3 15 .8839 |
0 16 .1429 | 1 16 .3929 | 2 16 .6429 | 3 16 .8929 |
0 17 .1518 | 1 17 .4018 | 2 17 .6518 | 3 17 .9018 |
0 18 .1607 | 1 18 .4107 | 2 18 .6607 | 3 18 .9107 |
0 19 .1696 | 1 19 .4196 | 2 19 .6696 | 3 19 .9196 |
0 20 .1786 | 1 20 .4286 | 2 20 .6786 | 3 20 .9286 |
0 21 .1875 | 1 21 .4375 | 2 21 .6875 | 3 21 .9375 |
0 22 .1964 | 1 22 .4464 | 2 22 .6964 | 3 22 .9464 |
0 23 .2054 | 1 23 .4554 | 2 23 .7054 | 3 23 .9554 |
0 24 .2143 | 1 24 .4643 | 2 24 .7143 | 3 24 .9643 |
0 25 .2232 | 1 25 .4732 | 2 25 .7232 | 3 25 .9732 |
0 26 .2321 | 1 26 .4821 | 2 26 .7321 | 3 26 .9821 |
0 27 .2411 | 1 27 .4911 | 2 27 .7411 | 3 27 .9911 |
5 | 940. | Decimal ] | Equival | cents of I | Pounds | and Ounce | !S. | ||
oz. | lb. | oz. | lb. | oz. | lb. | oz. | lb. | oz. | lb. |
i | .015625 | 3 | .1875 | 64 | .40625 | 10 | .625 | 134 | .84375 |
4 | .03125 | 34 | .21875 | 7 | .4375 | 104 | .65625 | 14 | .875 |
i | .046875 | 4 | .25 | 74 | .46875 | 11 | .6875 | 144 | .90625 |
l | .0625 | 44 | .28125 | 8 | .5 | 114 | .71875 | 15 | .9375 |
1 1/2 | .09375 | 5 | .3125 | 84 | .53125 | 12 | .75 | 154 | .96875 |
2 | .125 | 5 1/2 | .34375 | 9 | .5625 | 124 | .78125 | 16 | 1. |
24 | .15625 | 6 | .375 | 94 | .59375 | 13 | .8125 |
 
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