I. 



BEMAREB ON 



THE FORCES OF INOKGANIC NATURE. 



BY DR. J. R. MAYER. 



TRANSLATED BY J. C. FOSTER, B.A. 



n. 

 ON CELESTIAL DYNAMICS^ 



BY DK. J. R. MAYER. 

 TEANSLATED BY DE. H. DEBITS, F.E,8. 



ra. 



EEMAEXS ON 



THE MECHANICAL EQUIVALENT OF HEAT, 



BY DR. J. R. MAYER. 

 TBANSLATED BY J. 0. FOSTER, B.A. 



