MECHANICS OF THE EARTH S ATMOSPHERE — -ABBE 3 



In conclusion, the two memoirs* by Margules (xxiii, 1901, and 

 xxiv, 1904) introduce us to the great problems of the future, 

 that is, the thermal transformations of energy persistently going 

 on in the atmosphere. Margules has been the first to find methods 

 of studying and solving these problems. It only remains for 

 future students to combine the equations of thermodynamics 

 with those of hydrodynamics so as to further elucidate the details 

 of the phenomena as to time and place — a result that Ave may 

 hope will eventually be attained by the analysis of fields of force 

 that is now being perfected by Bjerknes of Christiania. 



Cleveland Abbe. 

 Washington, D. C. 



November, igoS. 



