GANNETT.] 
GEOGRAPHIC TABLES AND FORMULAS. 
123 
Table 20. — Five-place logarithms of natural numbers. 
[Fractional change in a number corresponding to a change in its logarithm.] 
Computed from the formula, 
^N A log N 
N ~ M ' 
>u=modulus of common logarithms = 0.43429448. 
For 
A log N 
= 1 unit in 
AN 
IT 
For 
AlogiNT 
= 4 units in 
AN 
N 
(in round 
numbers) 
Fourth place 
¥3 ¥2 9 
¥3T29ir 
Fourth place. 
tAo 
toAtt 
Toirooo 
TTToooTTo 
Fifth place 
Fifth place 
Sixth place 
Sixth place 
Seventh place 
Seventh place 
