o r5 Tables 432, 433. 



DIELECTRIC CONSTANTS. 



TABLE 432. — Dleleotrlo Oonstant (SpeoUlo Indaottve Oapaolty) of Quel. 

 Atmospberlo Pressure. 



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



Gas. 



Temp. 

 °C. 



Air 



Ammonia 



Carbon bisulphide . . . 



Carbon dioxide .... 



Carbon monoxide .... 



Ethylene 



Hydrochloric acid . . . 

 Hydrogen 



Methane 



Nitrous oxide (N-iO) . . 

 " " " . . 



Sulphur dioxide . . . . 

 Water vapor, 4 atmospheres 



o 



100 



Dielectric constant 

 referred to 



Vacuum = i Air= i 



1.000590 

 1.000586 



1.007 18 



1 .00290 

 1.00239 



1 .000946 

 r. 000985 



1.000690 

 1.000695 



1. 001 31 

 1. 00 1 46 



1.00258 



1.000264 

 1 .000264 



1.000944 

 1.000953 



1.00116 

 1 .00099 



1.00993 

 1 .00905 



145 1.00705 



1 .000000 

 1 .000000 



1 .00659 



1.00231 

 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. 

 KlemenCiC, 1885. 



Badeker, 1901. 



KlemenCiC. 

 Badeker. 



Boltzmann. 

 KlemenCiC. 



Boltzmann. 

 KlemenCiC. 



Boltzmann. 

 KlemenCiC. 



Badeker. 



Boltzmann. 

 KlemenCiC. 



Boltzmann. 

 KlemenCiC. 



Boltzmann. 

 KlemenCiC. 



Badeker. 

 KlemenCiC. 



Badeker. 



TABLE 433. —Variation ol the Dlelectrlo Oonstant with tlie Temperature. 



For variation with the pressure see next table. 



If Z?fl = the dielectric constant at the temperature 6° C, Dt at the tempera- 

 ture t° C, and a and j8 are quantities given in the following table, then 



£>e = l>t[l—a{t—e) + /3(/— 0)2]. 



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 ZP — i is approximately pro- 

 portional to the density. 

 Smithsonian Tablcs. 



