This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1878 Excerpt: ...400" 4J" 8 " 80 ds., 800 ds., 8000 ds. 3 J " 10.8 " 108" 3yr., 30 yr. 42-8.4" 84" 2J" 23" 84" 4.2" 42" 14 mo., 140 ms. Per mo. 1" 2 " 20" 200 ds., 2000 ds. - 2 " 1.5" 15" 5 mo., 50 mo. - 2i" 1.2" 12" 4" 40" - 1 - 3 " 1 mo., 10" 100" - ." 4 " 40 ds., 400 ds., 4000 ds. - 1J" 2.4" 24" 8 mo., 80 mo. All examples are ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1878 Excerpt: ...400" 4J" 8 " 80 ds., 800 ds., 8000 ds. 3 J " 10.8 " 108" 3yr., 30 yr. 42-8.4" 84" 2J" 23" 84" 4.2" 42" 14 mo., 140 ms. Per mo. 1" 2 " 20" 200 ds., 2000 ds. - 2 " 1.5" 15" 5 mo., 50 mo. - 2i" 1.2" 12" 4" 40" - 1 - 3 " 1 mo., 10" 100" - ." 4 " 40 ds., 400 ds., 4000 ds. - 1J" 2.4" 24" 8 mo., 80 mo. All examples are performed without making a figure. The periods of time are found in a moment by my rule on page 'seventeen of this work, where it is thoroughly explained and the reason given for each operation. By the same rule we can remove the point on the time, or number of days, to find the interest; because inverting the rate gives the time it takes a dollar to earn a cent, and annexing a cipher to that time gives the time it takes a dollar to earn ten cents, &c. Hence, at 8 per cent, per annum one dollar earns one cent in 45 days, hence $45 earn one cent in one day, and one hundredth part of the number of days equals the interest; and 450 dollars earn ten cents in one day, and one tenth of the number of days equals the interest. $4.50 at 8 per cent, per annum in one day earns a mill, hence one thousandth part of the number of days equals the interest, &c. &c. Inverting the rate finds the number of dollars it takes to earn one cent in one day at the given rate in all rates; annexing a cipher to that number of dollars, gives the number of dollars it takes to earn ten cents in one day; removing the decimal point one place to the left in the same number of dollars gives the number of dollars it takes at the given rate to earn one mill in one day, and removing the d...
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