A treatise on surveying, comprising the theory and the practice ; (1887)
Gillespie, W. M. (William Mitchell), 1816-1868, Staley, Cady, 1840- [from old catalog] ed · New York, D. Appleton and company · leaf 420
e are severalvarieties of this in-strument, differingprincipally in themethod of determin-ing the movement ofthe corrugated boxdue to changes in thedensity of the atmos-phere. They are made insizes varying from two to six inches in diameter. They are much used on account oftheir portability, but… … MEAN TEMPERATURE. 30° 40° 50° 60° 70° 80° Mean pressure, 27 inches 28 « 29 30 9-79-3 9-0 8-7. 9-99-59-2 8-9 10-1 9-89-49-1 10-3 10-0 9-6 9-3 10-510-2 989-5 10-810-4109-7 609. The Hypsometer. The temperature at which water boilsvaries with the pressure of the atmosphere, and therefore decreasesin…
Surveying
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