142 



TABLE 137.— THERMAL CONDUCTIVITY OF ORGANIC MATERIALS AND WATER 



Part 1 



TABLE 138.— THERMAL CONDUCTIVITY OF GASES 



The conductivity of gases, k t = i(°7 — S)nCv, where 7 is the ratio of the specific heats, 

 Cp/Cv, and (i is the viscosity coefficient (Jeans, Dynamical theory of gases, 1916). Theo- 

 retically kt should be independent of the density and has been found to be so by Kundt and 

 Warburg and 'others within a wide range of pressure below one atm. It increases with 

 the temperature. 



SMITHSONIAN PHYSICAL TABLES 



