TABLES 235-237. 

 TABLE 235. Thermal Conductivity of Organic Liquids. 



TABLE 236. Thermal Conductivity of Gases. 



* Air: k = 5.22 (io~ B ) cal. cm -1 sec.- 1 deg. C" 1 ; 5.74 at 22; temp. coef. = .0029 ; Hercus-Laby, Pr. R. Soc. 



190, 1919. 



TABLE 237. Diffusivities. 



The diffusivity of a substance = A 2 = k/cp, where k is the conductivity for heat, c the specific heat and p the density 

 (Kelvin). The values are mostly for room temperatures, about 18 C. 



Taken from An Introduction to the Mathematical Theory of Heat Conduction, Ingersoll and Zobel, 1913. 

 SMITHSONIAN TABLES. 



