Tables 343, 344. 309 



DIELECTRIC CONSTANTS. 



TABLE 343. — Dielectric Constant (Specific Inductive Capacity) of Oases. 

 Atmospberlc Pressure. 



Wave-lengths of the measuring current greater than loooo cm. 



Gas. 



Air 



Ammonia 



Carbon bisulphide . . . 



Carbon dioxide .... 



Carbon monoxide .... 



Ethylene 



Hydrochloric acid . . . 

 Hydrogen 



Methane 



Nitrous oxide (N2O) . . 



« l( u 



Sulphur dioxide .... 

 it <( 



Water vapor, 4 atmospheres 



Temp 



°C. 



o 

 100 



100 

 o 



o 

 o 



145 



Dielectric constant 

 referred to 



Vacuum= i 



1.000590 

 1.000586 



1.007 1 8 



1 .00290 

 1.00239 



1 .000946 

 1.000985 



1.000690 

 1 .000695 



1. 001 31 

 1. 00 1 46 



1.00258 



1.000264 

 1.000264 



1.000944 



1.000953 



I.00II6 

 1.00099 



1.00993 

 1 .00905 



1.00705 



Air=i 



1 .000000 

 1 .000000 



1.00659 



1. 0023 1 

 1. 00 1 80 



1.000356 

 1.000399 



1. 000 1 00 

 1. 000 1 09 



1.00072 

 1.00087 



1. 00199 



0.999674 

 0.999678 



1.000354 

 1.000367 



1.00057 

 1. 0004 1 



1.00934 

 1 .00846 



1.00646 



Authority. 



Boltzmann, 1875. 

 KlemenCiiJ, 1885. 



Badeker, 1901. 



KlemenCiC. 

 liadelcer. 



Boltzmann. 

 KlemenCiC. 



Boltzmann. 

 KlemenCiC. 



Boltzmann. 

 KlemenCiC. 



Badeker. 



Boltzmann. 

 KlemenCie. 



Boltzmann. 

 KlemenCiC. 



Boltzmann. 

 KlemenCiC. 



Badeker. 

 KlemenCiC. 



Badeker. 



TABLE 344. —Variation of the Dielectric Constant with the Temperature. 



For variation with the pressure see next table. 



If Do = the dielectric constant at the temperature 0° C, Z)/ at the tempera- 

 ture t° C, and a and are quantities given in the following table, then 



The temperature coefficients are due to Badeker. 



The dielectric constant of air at atmospheric pressure but with varying tem- 

 perature may also be calculated from the fact that I) — i is approximately pro- 

 portional to the density. 



Smithsonian Tables. 



