Discoveries and inventions of the nineteenth century (1905)
Routledge, Robert · London : G. Routledge and Sons · leaf 32
ighter,and the end E moves outward; but when the pressure is removed, thetube resumes its former shape. The graduations on the scale are made b>marking the position of the index when known pressures are applied. Theamounts of pressure, when the gauges are being graduated, are known bythe… … Fig. 7.—Bojcrdon^sPressure Gause. STEAM ENGINES. 13
Inventions
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