SPARKS 



FROM A GEOLOGIST'S HAMMER 



ALEXANDER WINCHELL, LL.D. 



AUTHOR or " PREADAMITES," ETC. ETC., AND PROFESSOR OF GEOLOGY AND 

 PALEONTOLOGY IN THE UNIVERSITY or MICHIGAN 



Das wichtigste Resultat des sinnigen physischen Forschens ist dieses, den 

 GEIST der Xitur zu ergreifen, welcher unter der Decke der Erscheinungen ver- 

 hullt liegt. A. v. HUMBOLDT 



I think it wise sometimes to shut up shop and walk in the twilight, and look 

 up at the stars or down upon the sea. J. P. LESLEY 



THIRD EDITION 



CHICAGO 



S. C. GRIGGS AND COMPANY 



1887 



