GANNETT.] 
GEOGRAPHIC TABLES AND FORMULAS. 
97 
Table 18. — Five-place logarithms of natural numbers. 
[Fractional change in a number corresponding to a change in its logarithm.] 
Computed from the formula, 
AN A l og N 
N ~ m ' 
/f=modulus of common logarithms = 0.43429448. 
For 
A logiV 
= 1 unit in 
AN 
N 
For 
A log N 
= 4 units in 
AN 
N 
(in round 
numbers) 
Fourth place 
¥3¥3 
Fourth place 
ToW 
To^oo 
To"ooW 
Fifth place 
Fifth place 
Sixth place 
Sixth place 
Seventh place 
Seventh place 
Bull. 214—03- 
