CASE I. When the quantity is given in cwt. &c. and the tare is not an aliquot part of a cwt. nor so much per cent.

Find the whole gross weight in cwt, &c; also find the whole tare in cwt. &c. and subtract the tare from the gross, the remainder will be the net weight.

EXAMPLES.

1. In 16 hogsheads of tobacco, each 5 cwt. 1 qr. 19lb. gross, tare per hogshead 100lb. how much net weight?

C. qr. lb.

4.

Whole tare, 14 1

Net 72 1 20 Ans.

2. In 14 hogsheads of tobacco,

weighing gross, 89 C. 3 qr. 17 lb. tare per hogshead, 100 lb. how much net weight? Ans. 77C. 1qr. 17lb. 3. What is the net weight of 38 hogsheads of tobacco, weighing gross 201 cwt. 3 qr. 12 lb. tare in the whole 3140 lb. Ans. 173 cwt. 3 qrs. 8 lb. 4. What is the net weight of 5 hogsheads of sugar, weighing as follows, viz?

CASE II. When the quantity is given in cwt. the tare so much per cent. and is an aliquot part or parts of

an cwt.

Divide the whole gross weight by such part or parts, that the tare is of an cwt. the quotient will be the whole tare, which subtracted from the whole gross, the remainder will be the net weight.

EXAMPLES.

1. What is the net weight of a hogshead of sugar, weighing gross 9 C. 3 qrs. 14lb. tare 14lb. per cent?

14 lb. is of an cwt. 8)9C. 3qr. 14lb. gross.

2. Required the net weight of 2 hogsheads of sugar, weighing together gross, 15C. 3qr. 18lb; tare per cent. 18lb.

16lb. is of cwt. 716C. 3qrs. 18lb. gross.

716C.

Ans. 13C. Iqr. 11lb. 10oz. net.

3. Required the net weight of 41C. 3qr. 9lb. gross of hops, tare per cent 20lb.* Ans. 34C. 1qr. 12lb. 7oz.

CASE III. When the quantity is given in cwt. &c. the tare so much per cent, but not an aliquot part, or parts of an cwt. then multiply the pounds gross by the tare per cent, and divide the product by 112, the quotient will be the tare, which subtracted from the gross, the remainder will be the net weight.

EXAMPLES.

1. What is the net weight of 30 barrels of figs, each 2C. 3 qr. gross, tare per cent 13lb ?

* This can be worked by taking parts, thus, 16lb. is 4 of cwt. and the 4lb. remaining of the 20lb. is of 16lb.

2. What is the net weight of 12 barrels of argol, each weighing gross 4C. Oqr. 8lb; tare per cent 15lb? Ans. 42C. 1 qr. 7lb. 3 oz. 3. What is the net weight of 12 butts of currants, each weighing 7C. 1 qr. 10lb. gross; tare per cent 15lb ? Ans. 76C. 1qr. 2lb. 15oz. CASE IV. When the quantity is given in casks, bags, bales, or boxes, with their several gross weight in pounds, and the tare of each in pounds..

Find the whole gross weight in pounds, also find the whole tare in pounds; subtract the whole tare from the whole gross, the remainder will be the net weight in pounds.

EXAMPLES.

1. What is the net weight of 3 chests of hyson tea, weighing as follows:

2. What is the net weight of 3 boxes of souchong tea, weighing as follows, viz. ?

CASE V. When tret is allowed; after subtracting the tare from the gross weight, reduce the remainder to pounds, which is called pounds suttle, and divide by 26, the quotient will be the tret, which subtract from the suttle, the remainder will be the net weight in pounds.

EXAMPLES.

1. In 8C. 3qr. 20lb. gross, tare 381b. tret 4lb. per 104lb. how many pounds net.

2. In 17 chests of sugar, weighing together 120 C. 2qr. gross, tare 176lb. tret 4lb. per 104lb. how many cwt. net? Ans. 114C. 1qr. 12lb.

3. In 177C. Oqr. 22lb. gross, tare 9lb. per cent, tret per 104lb. how many cwt. net?

4lb.

Ans. 156C. 2qr. 22lb. rejecting remainders.

CASE VI. When the net weight is given, and the gross weight required; this admits of three varieties, 1. When the net weight, and whole tare is given, add the tare to the net, gives the gross.

2. When the net weight, and the tare per cent are given, subtract the tare per cent, from 112lb. then say, as the remaining number of pounds is to 112 pounds, so is the given net weight in pounds, to the required gross weight in pounds.

3. When the net weight, and the tare are given, and tret has been allowed.

Divide the pounds net by 25, and add the quotient to the pounds net, and then proceed as in the 1st or 2d variety, as the case may require, to find the gross.

EXAMPLES.

1. What is the gross weight of 38 hogsheads of tobacco, which contains 173C. 3 qr. 8lb. net, the whole tare being 3140lb ?

NOTE. This proves the 3d example in Case I.

2. What is the gross weight of a hogshead of sugar, weighing 8C. 2qrs. 154lb. net; tare 14lb. per cent ?