Tables 257-259 

 TABLE 257. — Thermal Conductivity of Organic Liquids 



277 



Substance. 



Acetic acid 



Alcohols: methyl 



ethyl.. 



" amyl.. 



Aniline 



Benzene 



Substance. 



Carbon disulphide 



Chloroform 



Ether 



Glycerine 



Oils: petroleum. . . 

 turpentine. . 



Substance. 



Oils: olive. . 

 " castor, 

 Toluene. . . . 

 Vaseline. . . . 

 Xylene 



■ 03395 

 .03425 



■ 03349 

 .0344 

 •03343 



References: (1) H. F. Weber; (2) Lees; (3) Goldschmidt; (4) Wachsmuth; (5) Graetz. 



TABLE 258. — Thermal Conductivity of Gases 



* Air: k = 5.22 (10-') cal. cm "' sec.-' deg. C" 1 ; 5.74 at 22°; temp. coef. = .0029 ; Hercus-Laby, Pr. R. Soc. A95, 

 190, 1919. 



TABLE 259. — Diffusivities 



The diffusivity of a substance = h 1 = 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. 



Material. 



Aluminum 



Antimony 



Bismuth 



Brass (yellow) 



Cadmium 



Copper 



Gold 



Iron (wrought, also mild steel). . 

 Iron (cast, also 1% carbon steel) 



Lead 



Magnesium 



Mercury 



Nickel 



Palladium 



Platinum 



Silver 



Tin 



Zinc 



Air 



Asbestos (loose) 



Brick (average fire) 



Brick (average building) 



Diffusivitj 



0.826 



0139 



0.0678 



o.339 



0.467 



1 133 



1. 182 



0.173 



o. 121 



0.237 



0.883 



0.0327 



0.152 



o. 240 



0.243 



1-737 



0.407 



0.402 



o. 179 



0.0035 



0.0074 



0.0050 



Material. 



Coal 



Concrete (cinder) 



Concrete (stone) 



Concrete (light slag) 



Cork (ground) 



Ebonite 



Glass (ordinary) 



Granite 



Ice 



Limestone 



Marble (white) 



Paraffin 



Rock material (earth aver.) 



Rock material (crustal rocks) 



Sandstone 



Snow (fresh) 



Soil (clay or sand, slightly damp) 



Soil (verv dry) 



Water 



Wood (pine, cross grain) 



Wood (pine with grain) 



Diffusivity. 



.002 



.0032 



.0058 



.006 



.0017 



.0010 



.0057 



■0155 



.0112 



.0092 



.0090 



.0118 

 .0064 

 ■0133 

 ■0033 

 005 

 0031 

 .0014 

 . 00068 

 .0023 



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

 Smithsonian Tables. 



