e. In Pennsylvania, New Jersey, Delaware, and Maryland. For weighing gold, silver, jewels, liquors, &c. For weighing hay, grain, groceries, and all coarse articles. Formerly 28 pounds were reckoned to the quarter, 112 pounds to the hundredweight, and 2240 pounds to the ton. But this practice is fast becoming obsolete. 3. Apothecaries' Weight. Used for mixing, but not for selling, medicines. 175 ounces Troy are equal to 192 oz. Avoirdupois; 1 lb. Troy to 5760 gr.; and 1 lb. Avoirdupois to 7000 grains. The pound and ounce in Apothecaries' weight are the same as in Troy weight; the only difference is in their divisions and subdivisions. III. MEASURES OF CAPACITY. 1. Dry Measure. For dry wares, as grain, seeds, fruit, roots, sugar, salt, coal, lime, &c. The last three measures are hardly, if at all, used in the United States. 1008 252 2016 504 4 1 bar. 126 314=1 tier. = 1344= 336= 168= 42 =1}=1 hhd. 252= 63 =2 =11=1 pun. 2688 672 336= 84 =2}=2=1}=1 4032=1008 p. 504-126 =4 =3 =2 =11=1 T. 8064 2016=1008=252 8 6 =4 =3=2=1. The dry gallon contains 2684 cubic inches; the wine gallon 231 cubic inches; and the beer gallon 282 cubic inches. 660= 220= 40= 1 m. 1. b. c. 3= in. 190080 63360- 5280 1760= 320= 8=1 = 1 deg. 570240 190080= 15840= 5280= 960= 24= 3 13210560=4403520=366960=122320=22240=556=691=231=1 The point, the line, the hand, and the fathom, also belong to this measure. Six points make 1 line; 12 lines 1 inch, used in measuring the length of pendulums for clocks, and other small measurements. The hand is 4 inches, and is used for measuring the height of horses. The fathom is 6 feet, used principally for measuring depths of water. Sixty geographical miles make a degree. 6272640-43560 =4840 =160=4=1. By this measure, land, and husbandman's and gardener's work are measured; also the work of artificers, such as boards, glass, pavements, wainscoting, flooring, and every thing that has the two dimensions of length and breadth. Land is usually measured by Gunter's chain, which is four rods in length, and is divided into 100 equal parts, called links. Pupils are sometimes at a loss to understand why there are nine square feet in a square yard, and 144 square inches in a square foot. The following figures will make the matter plain : No. 1. |