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Show uu ANEROID CALORIMETER, SPECIFIC SPECI-FIC AND LATENT HEATS OF ICE. Washington, D. C, Sept. 2, There have recently been issued by the Bureau Bur-eau of Standards of the Department of Commerce two publications, Scientific Scien-tific Paper No. 247 entitled "An Aneroid Ane-roid Calorimeter" and Scientific Paper Pap-er No,248 entitled "Tho Specific Heat and the Heat of Fusion of Ice." Tn the former publication is described describ-ed a calorimeter which has been developed de-veloped by tho Bureau for measuring tho specific heats of substances throughout a wide range of temperatures. tempera-tures. The specific heats of substances substan-ces are tho amounts of heat required to heat unit weights of Biibstances ono degree in temperature, constants that ore of great importance in engineering engineer-ing calculations. In tho second publication above referred re-ferred to this calorimeter has been applied to the accurate determination of tho specific and latent heat of ico I.e. the amount of heat required to change the temperature of unit weight of ice ono degree and to molt unit weight of ice, both, constants of Importance Im-portance in the design of refrigerating machinery and in cold Btorage calculations. calcu-lations. Tho Bureau of Standards Is engaged on the determination of all the fundamental funda-mental constants of r'efrlgoration engineering, en-gineering, Including the physical properties pro-perties of the llquidB used in refrig. eratlon machinery, such as anhydrous ammonia, aqueous ammonia solutions carbon dioxide, ethyl chloride etc. also the determination of tho heat conductivity of materials entering Into In-to cold storage and refrigerator car construction, the thermal Insulation of steel railway cars, etc. Copies of tho publications described -lbove may bo obtained without charge o Interested parties upon application o tho Bureau of Standards, Dopart-nont Dopart-nont of Commerce, Washington, D, O. |