File:Armour engineer (1910) (14804520853).jpg

Identifier: armourengineer02armo (find matches)
Title: Armour engineer
Year: 1910 (1910s)
Authors: Armour Institute of Technology
Subjects:
Publisher: Chicago : Armour Institute of Technology
Contributing Library: Paul V. Galvin Library, Illinois Institute of Technology
Digitizing Sponsor: CARLI: Consortium of Academic and Research Libraries in Illinois

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fA^DAiCl aAaaamvrO .2 .oi^ Jau. 1910) SPITZGLASS: LOGARITHMIC CO-ORDINATES 133 The horizontal scale of the diagram is designated to readeither the absolute temperature, or the pressure of the gasin any system of units indicated by a given problem. Theoblique lines will substitute the proper volume factor for thepressure, and the corresponding weight factor for the tem-perature, while the vertical scale will always be the commonproduct. The weight factor on the oblique lines will neces-sarily include the coefficient R, which is reduced to unity byplacing the scale for the weight readings at a distance from 1the origin in proportion to the reciprocal of R, —, making the Requation pv = WT, and at the proper distance a line is drawn for the given gasand the given system of units to read the weight directly. The method of carrying a problem through the diagramis very simple. One set of factors given, either the pressureand the volume, or the weight and the temperature, for agiven system

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