" " " 



Xll CONTENTS. 



251. Coefficients of linear expansion of miscellaneous substances . . 233 



252. " " cubical " " crystalline and other solids . . 234 



" liquids ...... 235 



" thermal expansion of gases 236 



255. Mechanical equivalent of heat : various data ..... 237 



256. " " " " adopted values (Ames) . . .237 



257. " " conversion values . . . -237 



258. Specific heats of the chemical elements ...... 238 



259. " " " water and mercury 239 



260. Additional specific heats of the elements 240 



261. Mean specific heats of quartz, silica glass and platinum . . . 240 



262. Specific heats of various solids ........ 241 



263. " " " " liquids 241 



264. " " " " minerals and rocks 242 



265. " " " " gases and vapors 243 



266. Gas and mercury thermometers : formulae 244 



267. Comparison of hydrogen and i6 m thermometers : o to 100 C. . 244 



268. " " " " 59"' " o to 100 C. . 244 



269. " " " " I6 1 " and 59 1 " thermometers: -5 to-35C. 244 



270. Comparison of air and i6 m glass thermometers : o to 300 C. . . 245 



271. " " " " 59 1 " " " 100 to 200 C. . 245 



272. " " hydrogen and various mercury thermometers . . 246 



273. " " air and high temperature (59 m ) mercury thermometer . 246 



274. " " H., toluol, alcohol, petrol ether, pentane thermometers 246 



275. Platinum resistance thermometry 247 



276. Thermodynamic scale ; temperature of ice-point .... 247 



277. Standard points for calibration of thermometers .... 247 



278. Stem correction for thermometers ....... 248 



279- " " " 249 



280. " " " 249 



281. Calibration of thermo-element Pt.-Pt. Rh 250 



282. " " " " Cu-Constantan . ... 250 



283. Radiation formulae and constants for perfect radiator . . . .251 



284. " in calories for perfect radiators at various temperatures . 251 



285. " distribution in spectrum at various temperatures . .251 



286. Cooling by radiation and convection : ordinary pressures . . . 252 



287. " " " " " different pressures . . . 252 



288. " " " " " very small pressures . . 253 



289. " " " " " temperature and pressure effects 253 



290. Properties and constants of saturated steam : metric measure . . 254 



291. " " " " " " common measure . . 255 



292. Ratio of the electrostatic to the electromagnetic unit of electricity . 260 



293. Electromotive force of standard cells : absolute current measures . 261 



294. Data for voltaic cells : (a) double fluid cells 262 



() single fluid cells 263 



(f) standard cells 263 



