54 ELEMENTS OF STATIC ELECTRICITY. 



which is the same thing, its specific inductive capacity 

 is increased. All of which goes to prove that electric 

 transmission depends on molecular structure. 



SPECIFIC INDUCTIVE CAPACITIES OF VARIOUS 

 SUBSTANCES. 



Standard. 



Air at C. temperature and 760 mm. pressure, 1.0 



Solids. 



Paraffin, 2.09 



Caoutchouc, 2.23 



Gutta-percha, 2.46 



Shellac, 2.85 



Ebonite, 289 



Sulphur, . . 2.95 



Resin, . . . 3.6 



Glass, average of various kinds, 5.87 



Liquids. 



Bisulphide of carbon, 1.81 



Petroleum, 2.05 



Oil of turpentine, 2.19 



Gases. 



Hydrogen, H, at C. and 760 mm., .99941 



Carbonic oxide, CO, " " 1.00001 



Marsh gas, CH 4 , 1.00035 



Carbonic dioxide, CO 2 , " 1 00036 



Nitrous oxide, NO, " 1.00039 



Olefiant gas, C 2 H 4 , " 1.00072 



