What they are: A logarithm is the exponent you raise a base to in order to get a number, acting as the inverse of exponentiation. Why they matter: They simplify multiplication, division, and roots ...

THESE tables aim at popularising logarithms. Like other four-figure tables they give the logarithms of numbers from 1000 to 9999. While the ordinary tables give these in one opening of two pages by ...

IN mathematical tables the last figure in any tabulated number or difference must be liable to an error ±. When a number is extracted from the tables by aid of a ...