Henderson, C. Hanford (Charles Hanford), 1861-1941, Woodhull, John F. (John Francis), 1857-1941 · New York, D. Appleton and company · leaf 128
ig. 63).The greater the pressure,the more the flexible coverwill be forced in. Its mo-tion is transmitted by asystem of delicate leversto a light pointer, whichmoves over the surface ofa graduated circle. Thereading is made directlyin millimetres of mercury,the graduation being effect-ed by…
Physics
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