106 THE ORIGIN OP CREATION. 



passage of sound : " In the relative homogeneity of the atmos- 

 phere, or its being split up into many layers, we have a clue, 

 which may enable us to arrive at a knowledge why sounds of 

 equal intensity, will travel further in some days than others." 

 Long discussions and lectures will probably be the result of this 

 discovery, till, when it is on the point of being universally 

 adopted, another clue will be unfortunately discovered. 



