Society of Glass Technology · [Sheffield] · leaf 464
h 31. Specifications for BourdonTube Pressure Gauges. F. J. Schlink (J. Optical Soc. Amer.,1922, 6, 899).—These specificationswere advanced by the AmericanEngineering Standards Committee.The gauges were divided into twogroups; those for stationary use asair, steam, or water pressures, andthose for… … Fig. 10. J. R. C. 32. Differential Thermometer and its Application. A. W. C. Menzies and S. L. Wright (Proc. National Acad. Sci.U.S.A., 1921, 7, 77; Zeitsch. Instrumentenkunde, 1922, 11, 344).—The thermometer consisted of a glass tube about 12 cm. long and1 cm. thick, with a mm. scale, and ending…
Glass
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