A logarithm is the power which a certain number is raised to get another number. Before calculators and various types of complex computers were invented it was difficult for scientists and ...

THERE can be little doubt that much time is lost by students and others who have occasion to make numerical calculations through unfamiliarity with the practical advantages of logarithms. In the ...

THE general procedure in determining numerical values in a scientific investigation is as follows. From a few observations we first compute the approximate values of certain constants, using for this ...

Frequently issued with the treatises on surveying of John Gummere, Robert Gibson, and Zachariah Jess. Authorship has been ascribed to Gummere, Gibson, and also to John Robertson. "Stereotyped by J.