cwt. gr.

lb.

10 1 12

4

41

28

$30
83

1S)1160 gross. 145 tare.

1234

26) 1015 suttle. }

39 trett.

Ans. 976lb. neat.

2. In 9 cwt. 2 qrs. 17 lb. gross, tare 41 lb. trett 4 lb. per 104 lb. how much neat? Ans. Scut. Sqrs. 20lb.

ewt. grs. ib.

No Gross 1 2 15

1 0

25

1 0 09

0 S 21

suttle.

1 11 trett.

3. In 15 chests of sugar, weighing 117 cwt. 21 lb. gross, tare 173 lb. trett 4 lb. per 104, how many cwt. neat? Ans. 111cwt. 22lb.

Ans. 8 2 24

4. What is the neat weight of 3 tierces of rice, each weighing 4 cwt. 3 qrs. 14 lb. gross, tare 16 lb. per cwt, and allowing trett as usual?

Ans. 12cwt. Ogrs. 6lh. 5. In 25 barrels of figs, each 84 lb. gross, tare 12 lb. per cwt. trett 4 lb. per 104 lb.; how many pounds neat?

Ans. 1803+

6. What is the value of the neat weight of 4 barrels of Spanish Tobacco; numbers, weights, and allowances as follows, at 94d. per pound?

Tare 16 lb. per cwt.
Trett 4 b. per 104 lb.

Ans. £17 16s. Sd.

TARE AND TRETT.

CASE V.

When Tare, Trett, and Cloff are allowed:

Deduct the tare and trett as before, and divide the suttle by 168 (because 2 lb. is the 7 of 3 cwt.) the quo tient will be the cloff, which subtract from the suttle, and the remainder will be the neat weight.

119

26)4368 suttle.
168 trett.

168)4200 suttle
25 cloff.

Ans. 4175 neat weight.

2. What is the neat weight of 20 cwt. 5 grs. 20 lb. S gross tare 52 lb. the allowance of trett and cloff as usual ? Ans. neat 25cwt. 1gr. 5lb. 1oz. nearly; omitting further fractions.

INTEREST.

INTEREST is of two kinds; Simple and Compound.
SIMPLE INTEREST.

Simple Interest is the sum paid by the borrower to the
lender for the use of money lent; and is generally at a
certain rate per cent. per annum, which in several of the
United States is fixed by law at 6 per cent. per annum ;
that is, 6l. for the use of 100l. or 6 dollars for the use of
100 dollars for one year, &c.
Principal, is the sum lent.

Rate, is the sum per cent. agreed on,
Amount, is the principal and interest added together.
CASE I.

To find the interest of any given sum for one year.
RULE.

Multiply the principal by the rate per cent. and divide the product by 100; the quotient will be the answer.

EXAMPLES.

1. What is the interest of 39%. 11s. 8d. for one year at 61. per cent. per annum ?

S. d.

39 11 84.

6

237 10 S

20

7150

12

6103

0/12

Ans. £2 7s. 6d. 786

2. What is the interest of 2661. 10s. 4d. for a year, at per cent. ?

5

Ans, £11 16s. 6d.

3. What is the interest of 571l. 13s. 9d. for one year, at 61.

per cent. ?

Ans. £34 6s. old.

4. What is the interest of 21. 12s. 94d. for a year, at
per cent. ?
Ans. £0 Ss. 2d.

6li

FEDERAL MONEY.

*

5. What is the interest of 468 dols. 45 cts. for one year at 6 per cent.?

$.cts.

468, 45

6

2810, 70-828, 10cts. 7m. Ans.

Here I cut off the two right hand integers, which divide by 100 but to divide federal money by 100, you need only call the dollars so many cents, and the inferior denominations decimals of a cent, and it is done.

Therefore you may multiply the principal by the rate, and place the separatrix in the product, as in multiplication of federal money, and all the figures at the left of the separatrix, will be the interest in cents, and the first figure on the right will be mills, and the others decimals of a mill, as in the following

EXAMPLES.

6. Required the interest of 135 dols. 25 cts. for a year at 6 per cent. Sects.

135, 25

6

811, 50=88, 11cts. 5m. Ans.

7. What is the interest of 19 dollars 51 cents for one year at 5 per cent.?

$cts

19, 51
5

97, 55-97cts. 51m. Ans.

8. What is the interest of 436 dollars for one year, at 6 per cent

6

Ans. 2616cts.=$26, 16cts.

ANOTHER METHOD.

Write down the given principal in cents, which multi ply by the rate, and divide by 100 as before, and you will have the interest for a year, in cents, and decimals of a cent, as follows:

9. What is the interest of 873, 65 cents for a year, at per cent. ?

6

Principal 7365 cents.
6

Ans. 441,90cts.441ets. or 84, 41ets. 9m.
10. Required the interest of $85, 45cts. for a year, at
cent. ?
per

7

Cents.

Principal 8545

7

Ans. 598, 15 cents, $5,98cts. 13m.

CASE II.

To find the simple interest of any sum of money, for any number of years, and parts of a year.

GENERAL RULE.

*

1

1st. Find the interest of the given sum for one year. 2d. Multiply the interest of one year by the given number of years, and the product will be the answer for

that time.

and

Sd. If there be parts of a year, as months and days, work for the months by the aliquot parts of a year, for the days by the Rule of Three Direct, or by allowing 30 days to the month, and taking aliquot parts of the

same.

*

By allowing the month to be 30 days, and taking aliquot parts thereof, you will have the interest of any ordinary sum sufficiently exact for common use; but if the sum be very large, you may say,

As 365 days is to the interest of one year given number of days : to the interest required.

so is the