SPARKS 



FROM A GEOLOGIST'S HAMMER 



BY 



ALEXANDER WINCHELL, LL.D. 



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

 PALEONTOLOGY IN THE UNIVERSITY OF MICHIGAN 



Das wichtigste Resnltat des sinnigeu physischen Forschcns ist dieses, den 

 GEIST der Natur zu ergreifen, welcher unter der Decke der Erscheimmgen ver- 

 hiillt liegt. A. v. HUMCOLDT 



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 



CHICAGO 

 S. C. GRIGGS AND COMPANY 



1881 



