Text-book of general physics, for the use of colleges and scientific schools (1899)
Hastings, Charles Sheldon · Boston: Ginn & company · leaf 134
ometer scale. The tubeis attached to the cistern bymeans of a piece of chamoisskin, F. which prevents theescape of the mercury butdoes not support any dif-ference of pressure betweenthe outside and inside air.The glass tube is protectedby an outer brass case grad-uated to millimeters andfurnished… … Fig. 80. mav be mounted in cninbals ■ o e transported, the screw S ise T are entirelv full of mer- 124 MECHANICS OF FLUIDS. cury. Entrance of air into the tube and breaking of theglass by bumping of the mercury against the end are thusprevented. To obtain the true hight of the barometer the…
Physics
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