Logarithms are a convenient way to express large numbers. Before the invention of calculators, the only alternative to slide rules was to use tables of logarithms. Some important formulae, also called ...

THIS is a well-arranged and clearly printed book of forty-three octavo pages. Besides four figure logarithms of numbers and of circular functions, and the circular functions themselves, it contains a ...

DR. GUILLEMIN'S two tables possess several interesting features. Taking, in the first place, Table A, which is used for working to six places of decimals, this contains the antilogarithms, calculated ...