CONSTITUENTS OF THE UNIVERSE. 



This mode of motion has greater range than 

 that manifested in cohesion and chemical 

 changes. It is the mode that bears the closest 

 resemblance to the radial, but unlike that 

 seems to be confined to the limits of the mass 

 on which it is manifested. 



It is a movement of great velocity as com- 

 pared to any other motion made use of in the 

 arts, and for that reason a proportionately less 

 quantity is required to accomplish the same 

 amount of work or to overcome the same re- 

 sistance. 



The most important feature of this motion is 

 its convenience and adaptability to various re- 

 quirements, many of which it would be diffi- 

 cult if not impossible to accomplish by any 

 other means; and in the future, it will prove 

 to be of immeasurable benefit to mankind. 



In the practical use and transmission of this 

 motion, two things are essential, conductors 

 and insulation; for without the agency of both, 

 the current could not be controlled. By means 

 of conductors, the current can be made to move 



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