CONSTITUENTS OF THE UNIVERSE. 



Perpetual Motion. 



fHE perpetual motion hobby is ridden by 

 many who are supposed to be too well in- 

 formed to waste their lives in trying to 

 accomplish the impossible; while there is no 

 telling how many there are astride this hobby 

 who lack the requisite information to steer 

 clear of all such impractical schemes. 



Among all the votaries of perpetual motion, 

 it is doubtful if even one can be found who 

 does not fully understand that a pendulum, a 

 scale beam, or vacuum pump cannot be made 

 to move continuously except a continuous 

 motion is applied. The reason why they do 

 not attempt to make perpetual motion with 

 these simple devices is because they under- 

 stand them; and yet the pendulum at least can 

 be made to continue a given motion with a 

 given impulse longer than any other device, 

 but it will not move perpetually. 



This simple fact alone ought to deter any one 

 from attempting to make any machine with a 

 view to perpetual motion. This class of in- 



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