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Title: The Slide Rule
Author: H. V. Beck
Source: 1936 Southwestern Gas Measurement Short Course (Now called ISHM)
Year Published: 1936
Abstract: The slide rule is an instrument used to a great extent by engineers for the purpose of performing multiplication, division, and similar operations. It furnishes a means of performing rapid and reasonably accurate calculations, and when used by a person farailiar with its operation, tlie results obtained are dependable values. Slide rules may be constructed for almost any kind of computation. Special rules have been built for the computation of interest charges, for the focal length of lens, for determining the discliarge from orifice meters, and for many other rjifferent purposes. The most common slide rules, however, are the ordinary polyphase and log-log rules used for straight multiplication, division, and the evaluation of factors raised to a power. These are the most diversified types of rules since practically any calculation may be made with them, altliough the operation may not be as easy a one du with a rule built specifically foi the type of calculation to be made.

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