137 



Odorous substances never have verj large molecules. ') Therefore, 

 there will never be an extremely strong tendency to form amicrons, 

 subsequenll)' submicrons, as soon as the supply ot energy that may 

 pass into surface-energy, is established. This accounts for the process 

 being hitherto unobserved. But when working with much larger 

 molecules, we may readily presume that the process of transformation 

 is highly facilitated, and will show itself very distinctly, whenever 

 electromagnetic waves, mechanical energy, or the unknown source 

 of energy, suggested above, are present, from which the particles 

 to be formed, derive their surface-energy. 



') The odorous substances examined by us, had a molecular weight between 

 78 and 199; the number of their atoms amounted to from 14 to 27, on the 

 understanding that no multiple of the chemical formula should be taken. 



