822 



SMITHSONIAN PHYSICAL TABLES 



Telescopes, largest in use, 728 

 Temperature, 7 

 brightness, 97 



correction to true, 99 

 variation with a, 86 

 color, 8 



and brightness, 104 

 carbon, 104 



various substances, 104 

 conversion tables, inside front cover 

 correction to true, 99 

 corrections to mercury thermometer, 72 

 critical (gas and vapors), 276 

 definition in different ranges, 70 

 earth: 



highest. 726 

 lowest, 726 



selected stations, 726 

 surface, 726 



variation with depth, 727 

 electron volt, equivalent, 21, 54 

 fixed points: °C 1948, 71 

 primary, 71, 72 

 gold point, 71 

 ice point, 47, 71, 72, 73 

 oxygen point, 71 

 silver point, 71 

 steam point, 71 

 sulfur point, 71 

 secondary, 70, 72 

 flames, 182, 293 

 ice point, 47, 73 



international temperature scale of 1927, 

 70 

 and older scales, 74 

 international temperature scale of 1948, 

 71 

 and 1927 scale, 74 



interpretation for different ranges, 74 

 Wien's equation, 72 

 interstellar space, 763 

 measurement, 71, 72, 87, 97 



correction for emergent mercurial 

 thread, 72, 73 

 old thermoelectric scales, 74 

 planets, 734 



reduction to gas scale, 73 

 reduction to thermodynamic scale, 73 

 reference tables for thermocouples, 75 

 scales, 75 

 Celsius, 8 

 Centigrade, 8 

 Fahrenheit, 8 

 gas to thermodynamic, 73 

 international: 

 1927, 70, 71 

 1948, 70, 72 



comparison with 1927 scale, 71 

 Kelvin, 9 

 old, 74 

 radiant, 9 

 Rankin, 9 

 Reaumur, 9 

 thermodynamic, 9 

 secondary points (1948), 70, 71 

 standard, 71 



Temperature — continued 



standard fixed points (see also Fixed 

 points), 8 



thermocouple data, 75 



true, 99 



less brightness, 99 



various places (monthly means), 726 



Wien equation, corresponding tempera- 

 tures on 1948 scale, 72 

 Tenth-meter, 7 



Terrestrial magnetism {see Geomagnetism) 

 Thallium brome-iodide, 515 

 Thermal capacitance, 9 

 Thermal conduction vs. temperature, 114 

 Thermal conductivity, 9 



alloys, 138 



cork, 139 



cotton, 139 



fireclay, 141 



fourier, 144 



various materials, 144 



gases, 142 



insulating materials, 139 



leather, 233 



liquids: as a function of pressure, 143 

 organic, 142 



materials, various, 136, 139, 141 



metals, 138 



organic liquids, 142 



plastics, 239 



rocks, various, 136, 140 



rubber, 140 



salt solutions, 136 



substances, various, 136, 141 



water, 142 



salt solutions, 136 



woods, 140 



wool, 140 

 Thermal emf (see Emf) 

 Thermal expansion, coefficient of, 8, 145 



alloys, 149 



crystals, 152 



cubical, 148, 153 



elements, 145 



gases, 154 



leather, 233 



liquids, 153 



metals, 145 



miscellaneous materials, 152 



plastics, 239 



rubber, 235 

 Thermal properties: gases, 259 



liquid ammonia, 178 



saturated steam, 168, 169, 175 



saturated water, 168 



superheated steam, 176 

 Thermal resistivity in fouriers, 144 

 Thermochemistry, various materials, 185 



heat of formation, 186 

 Thermocouples, reference tables for, 74-78 



chromel-alumel, °F, 78 



iron-constantin, °C-°F, 76, 77 



platinum to platinum 10 percent, °C-°F, 

 75 

 Thermodynamic laws, 9 



