Page:Methods of Operating the Comptometer (1895).djvu/2

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INDEX.

To Set the Machine at Naught 1
Explanation of the Key-Board 1
Addition 1-4
Not Necessary to Strike Keys in Regular Order 2
How to Finger the Keys 3
Finger Exercise 4
Position Illustrated 4
Multiplication 5-10
Proper Key Strokes 5
Colored Diagram of Key Strokes 6
Explanation of Diagram 7
Position of Hands for 8
Two Finger Method 9
Where the Sum to be Multiplied Stands on the Register of Machine 9
Where the Multiplier Consists of Two Figures and the Multiplicand is Already on the Machine 9
Multiplying High Decimals 10
The Red Figures 11
Subtraction 12
Correcting Mistakes 12
Division 13-21
Rule for Small Divisors 13-17
Position of Hands for 18
Rule for Large Divisors 18
Dividing High Decimals 21
Common Fractions 22
Stone Measure 23
British Exchange 24-28
Addition of 24-25
Reduction of United States Money to 26
Table for Reducing 27
Reducing United States Money to 26-28
Interest 29
Discounts 30
Compound Interest 31
Square Root 32-33
Equations 34

PRICE OF THIS BOOK $5.00.
COPYRIGHT 1895, BY FELT & TARRANT MFG. CO.