FROM 



NEBULA TO NEBULA 



OR 



THE DYNAMICS OF THE HEAVENS 



(Euutaiuuw 



A BROAD OUTLINE OF THE HISTORY OF ASTRONOMY 



A GENERAL SUMMARY OF ITS ACHIEVEMENTS 



A SYNOPSIS AND CRITICISM OF RECENT 



COSMOLOGICAL THEORIES 



AN EXPANSION OF THE PRINCIPLE OF UNIVERSAL 



GRAVITATION TO THE SOLUTION OF MANY 



COSMIC PROBLEMS HERETOFORE DEEMED 



INSOLUBLE 



BY 



GEORGE HENRY L.EPPER 



THIRD EDITION REWRITTEN AND ' ENLARGED 



PRIVATBT.Y 



UKKOKH BtJILDINO, PITTSBUHGH, PA. 

 1917 



