XTU 
EXPLANATION OF THE CONSTRUCTION AND USE OP THE 
TABLES IN PART I. 
By means of Table I., the decimal parts of a pound, corresponding to 
any number of shillings, pence, and farthings, may be found by inspec 
tion. 
Table II. shows the decimal parts of a year corresponding to any 
number of days, by means of which, when the rate for a whole year is 
given, the proportionate part for any number of days is easily found. 
Example. A borrows a sum, for the loan of which he is to pay 
simple interest at the rate of £74 6 10 per annum, but wishing at the 
expiration of 27 days to repay the amount, it is required to know what 
sum he must pay for interest ? 
By Table I., £74 6 10=74.34166 
which multiplied by the number j 
opposite 27 days in Table II., i. 0739726 
viz. . . . J 
gives 5.499=£5 10, the interest required. 
Table III. shows the amount of £l in any number of years, and is 
constructed by multiplying the amount of £l in one year by itself, 
which gives the amount of £l in two years; this again multiplied by 
the amount of £l in one year, gives the amount at the end of three 
years; and so on for any number of years. 
At 4 per cent the amount of £l in one year is 1.04 
this multiplied by . . . . 1.04 
gives 1.0816 = 
the amount of ¿£l at the end of two years. 
1.0816 X 1.04=1.124864=the amount of ¿£l at the end of three 
years. 
Again, 1,124864 x 1.04= 1.16985856=the amount of £l at the 
end of four years. 
By means of this table the amount of any sum in a given number of 
years may be found by multiplying the amount of £l in the given time, 
by the sum of which the amount is required. 
Example. To find the amount of £56 in 18 years at 3^ per cent 
compound interest, we look in the table under 3^ per cent opposite to 
18 years, and there find 1.85748920, which, multiplied by 56, gives 
104,018=£ 104 0 4, the amount required. 
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