136 



TABLES 130-141.— HEAT FLOW AND THERMAL CONDUCTIVITY 



TABLE 130.— CONVERSION FACTORS BETWEEN UNITS OF HEAT FLOW 



joules 



ca! 



1 — ^-^ =4.185 



sec cm 



1 



36000. 



^^- = 1.163 X 10- 4 2.778 X 10" B 1 



hrm 2 

 Btu 



hrft s 



1 hp/ft 2 = .8027 

 1 watt/in. 2 = .1550 



3.153 X 10- 7.535 X 10" 



Btu 



kilocal 

 watts/cm 2 sec cm 2 hr m 2 hr ft 2 



1 watts/cm 2 =1 .2390 8602. 3171. 



hp/ft 2 



1.246 



watts/in. 2 



6.452 



2.713 



1.327 X 10 4 5.212 27.00 



.3687 1.448 X 10" 4 7.500 X 10~ 4 



1 



.1918 6905. 2546. 



3.704 X 10" 2 1333. 491.5 



3.928 X 10" 4 2.035 X 10" 

 1 



.1931 



5.179 



1 



TABLE 131.— THERMAL CONDUCTIVITY OF VARIOUS SUBSTANCES 

 Part 1. — Various Substances 



Substance, kt 



temperature °C cgs 

 Aniline BP 183, — 160. . .000112 



Carbon, gas 010 



Carbon, graphite 012 



Carborundum 00050 



Concrete, cinder 00081 



stone 0022 



Diatomaceous earth 00013 



Earth's crust 004 



Fire-brick 00028 



Fluorite, —190 093 



Fluorite, 025 



Glycerine, — 160 00077 



Iceland spar, -190 038 



Iceland spar, 0103 



Substance, kt 



temperature °C cgs 



Lime 00029 



Mica 0018 



Flagstone _|_ to c'eavaa;e. .0063 

 Micaceous || to cleavage. .0044 

 Naphthalene MP 79, 



-160 0013 



Naphthalene MP 79 00081 



Naphthol— MP 122, 



-160 00068 



Naphthol, 00062 



Nitrophenol MP 114, 



-160 00106 



Nitrophenol. 00065 



Paraffin MP 54, -160.. .00062 

 Paraffin, 00059 



Substance, kt 



temperature °C cgs 



Quartz J_ to axis, —190. .0586 



" , 0173 



" ,100 0133 



Quartz || to axis, 0325 



Rock salt, 0167 



Rock salt. 30. 0150 



Rubber, vulcanized, 



— 160 00033 



Rubber, 00037 



Rubber, para 00045 



Sawdust 00012 



Snow, fresh, dens. = .ll. .00026 



Vaseline, 20 00022 



Vulcanite 00087 



Part 2.— Rocks 45 



45 Birch, Francis, Handbook of physical constants, Geological Society of America, 1942. Used by permission. 

 TABLE 132.— THERMAL CONDUCTIVITY OF WATER AND SALT SOLUTIONS 



SMITHSONIAN PHYSICAL TABLES 



