CONSTITUENTS OF THE UNIVERSE. 



When carbon dioxide is produced by com- 

 bustion, a collision occurs between the oxygen 

 and carbon that is just equal in amount to the 

 motion that is arrested by that occurrence, 

 precisely as if two bullets in their flight should 

 meet in mid-air. 



If a piston is raised in a cylinder a certain 

 distance, by the motion of a gas, the same pis- 

 ton will be raised twice that distance with the 

 same quantity of gas, by raising the tempera- 

 ture a sufficient degree; but how could that 

 be accomplised except for the reason that 

 motion takes up room? 



The motion called heat always takes up 

 room in proportion to the quantity in any 

 given case. Space is absolutely essential to 

 motion, and the earth occupies a quantity of 

 space in its yearly motion around the sun of 

 probably more than a hundred thousand times 

 its own quantity or volume. As motion has 

 volume or quantity, the rational inference 

 seems to be that it has been mistaken for mat- 

 ter in this very particular, and principally for 

 this very same reason. 



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