# Orton's Lightning Calculator, and Accountant's Assistant: The Shortest, Simplest, and Most Rapid Method of Computing Numbers, Adapted to Every Kind of Business, and Within the Comprehension of Every One Having the Slightest Knowledge of Figures

T.K. Collins, 1866 - Mathematics - 194 pages
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### Contents

 Section 1 4 Section 2 5 Section 3 9 Section 4 19 Section 5 20 Section 6 29 Section 7 30 Section 8 32
 Section 10 87 Section 11 99 Section 12 102 Section 13 107 Section 14 118 Section 15 123 Section 16 174 Section 17 180

 Section 9 77
 Section 18 183

### Popular passages

Page 80 - Thou shalt not lend upon usury to thy brother; usury of money, usury of victuals, usury of any thing that is lent upon usury: unto a stranger thou mayest lend upon usury; but unto thy brother thou shalt not lend upon usury...
Page 183 - OF TIME. 60 Seconds = 1 Minute 60 Minutes «= 1 Hour 24 Hours => 1 Day 7 Days = 1 Week 28 Days =• 1 Lunar Month...
Page 183 - CUBIC MEASURE 1728 cubic inches = 1 cubic foot 27 cubic feet = 1 cubic yard...
Page 144 - To measure a Parallelogram, or long square. RULE. Multiply the length by the breadth, and the product will be the area or superficial content.
Page 145 - Or, in measuring boards, you may multiply the length in feet by the breadth in inches, and divide the product by 12 ; the quotient will give the answer in square feet, etc. 21x18 Thus, in the last example, =31£sq, ft., us before. 12 5. If a board be 8 inches wide, how much in length will make a foot square ? RULE.
Page 182 - The quarters are divided in the same way. The description of a forty acre lot would read : The south half of the west half of the south-west quarter of section 1 in township 24, north of range 7 west, or as the case might be ; and sometimes will fall short and sometimes overrun the number of acres it is supposed to contain.
Page 132 - ... broad; what length must a ladder be to reach from the outside of the ditch to the top of the castle?
Page 143 - EXAMPLES. 1. How many square feet of boards are contained in the floor of a room which is 20 feet square?
Page 131 - Ans, 327 As the unit figure, in this example, is 9, if the number is a square, it must divide by either 9, or 49. After dividing by 9 we have 11881 for the other factor, a prime number, therefore its root is a prime number=109.
Page 42 - CENTS. Now, as removing the decimal point one place to the left, on the cost of a dozen articles, gives the selling price of a single one with 20 per cent, added to the cost, and, as the cost of any article is 100 per cent., it is obvious that the selling price would be 20 per cent, more, or 120 per cent. ; hence, to find 50 per cent, profit, which would make the selling price 150 per cent., we would first find 120 per cent., then add 30 per cent...