MOVEMENTS OF COMPASS NEEDLES. 



95 



plished by the propelled globes of rotating planets ; 

 which, like propelled rifle-balls, are sped on their 

 way, transmitting impulses imparted to them, and 

 executing the will of a calculating intelligence. 



The vast universe was propelled into space 

 by an all-wise and all-powerful Maker; and that 

 propulsive action, which thrills every world and 

 molecule, will cease only by the exercise of that 

 Maker's will. 



The governing principle of the material universe 

 is Propulsion rather than Attraction. 



It now remains to investigate the reciprocal 

 movements of bodies, produced by transverse 

 electric currents. 



How do the currents circulating from east to 

 west about the earth produce the horizontal 

 movements of compass needles, turning them 

 around on their pivots ? By experimental inves- 

 tigation with conducting wires arranged near one 



A 5 



8 7 6 



Fig. 19 



another, in various relative directions, it has been 

 ascertained that bodies serving as electrodes are 

 propelled in directions rectangular to the lines of 

 the currents, as represented in Fig. 19. 



