Medium separating Electrified Particles. 



363 



The electrical energy-cells are constantly tending to con- 

 tract both in length and section, but so that the area of the 

 section always bears a con tant ratio to the length of the cell. 

 The gravitational energy-eel's, on the other hand, constantly 



1ST. 6. 



tend to expand, the same ratio holding between area and 

 length as in the former case. While each electrical cell con- 

 tains according to Maxwell's theory half a unit of energy, 

 the gravitational cells must be supposed to contain half a 

 unit less of energy than the same volume of undisturbed 



