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7168=

16=

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28 1 Quarter.

28672= 1792 = 112= 4 1 Hundred Weight.

=

57344035840 224080 20 1 Ton.

By this Table are weighed all commodities that are subject to waste; as Grocery and Chandlery wares, Provisions in general, and all Metals but silver and gold.

By comparing the number of grains in the Avoirdupois and Troy pound and ounce respectively, it appears that the Troy pound is less than the Avoirdupois, in the proportion of 14 to 17 nearly; but the Troy ounce is greater than the Avoirdupois, in the proportion of 79 to 72 nearly.

1 lb. Avoirdupois = 14 oz. 11 dwt. 15 gr. Troy.

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For scientific purposes the grain only is used; and sets of weights are constructed in decimal progression from 10,000 grains downwards to 1 of a grain.

The carat, used for weighing diamonds, is 3 grains. The term, however, when used to express the fineness of gold, has a relative meaning only. Every mass of alloyed gold is supposed to be divided into 24 equal parts: thus the standard for coin is 22 carats fine; that is, it consists of 22 parts of pure gold, and 2 parts of alloy. What is called the new stundard, used for watch-cases, &c., is 15 carats fine.

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Some goods are sold not only by the cwt., lb., &c., but in particular quantities, or in packages of a certain weight, as

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In purchasing wool from the grower, 28 lb. make a legal tod; but woolstaplers, in their transactions with each other and with manufacturers, allow 30 lb. to the tod, and 8 tods to the pack.

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Silks are weighed, some 24 oz., others 16 oz. to the lb. 25lb. is a qr. cwt., 100 lb. 1 cwt., 20 cwt. 1 ton of gold or silver. A bushel of coal is 88 lb.: a bushel of flour 56 lb.

LONG, OR LINEAL MEASURE.

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HIS Measure

respects length

only, and is used in taking the distance from one place to another. An Inch is the smallest lineal measure to which a name is given; but sub-divisions

are used for

many purposes. Among mechanics the inch is usually divid

ed into eighths : by the officers

of the revenue, and scientific persons, it is divided into tenths, hundredths, &c.

The length of 3 barley-corns was formerly reckoned an inch; but a barley-corn is no measure. The inch was also made to consist of 12 parts, called lines, but these have properly fallen into disuse.

Land is measured by a chain of 4 poles long, which is 22 yards, or 66 feet; and contains 100 links. Ten chains in length, and one in width, make an acre.

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