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Page iv - If the number is less than 1, make the characteristic of the logarithm negative, and one unit more than the number of zeros between the decimal point and the first significant figure of the given number.
Page iv - If the number is between 0.1 and 0.01, the logarithm is between —1 and —2. If the number is between 0.01 and 0.001, the logarithm is between —2 and —3. And so on. 7. If the number is less than 1, the logarithm is negative (§ 6), but is written in such a form that the fractional part is always positive. For the number may be regarded as the product of two factors, one of which lies between 1 and 10, and the other is a negative power of 10 ; the logarithm will then take the form of a difference...
Page iii - The logarithm of a power of a number is found by multiplying the logarithm of the number by the exponent of the power. For, A« = (10°)