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Title: Fundamental Principles Op Specific Gravity Determination
Author: P. J. Renner
Source: 1944 Southwestern Gas Measurement Short Course (Now called ISHM)
Year Published: 1944
Abstract: WHY FUNDAMENTALS? It has been said that the technical man knows why the practical man knows how but the successful man knows both why and how. There is a very large element of truth in this sayhrg. Most of us here in this class are quite familiar with the how of determining specific gravity of gases. Some of you are thoroughly familiar with the operation of a certain type of specific gravity apparatus. Others are more familiar with other types of instruments and metliods. Some, more fortunate, have a good working knowledge of varied methods of determining specific gravity. To be a top man in the gas measurement field, this is not enough. We must not only know how to run a specific gravity test with a certain type of equipment, we must know why. Why should we dry the air in using a gas balance? Why should the air check and the gas check be made under the same temperature conditions? Or, if the temperatures are not the same, iiow and why do we apply the corrections? Why specific gravity, anyway?

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