1880. 

 ASSISTANT GEOLOGISTS. 



Persifor Fbazeb, Jr. — Geologist in charge of tlie Survey of Adams, York, 



Lancaster and Cliester counties. 

 AMBROSE E. Lehman— Topographical Assistant, for niapijing the South 



Mountain. 

 Fbederick Prime, Jr. — Geologist in charge of the Survey of Northampton, 



Lehigh, and Berks counties. 



E. V. d'Invilliebs — Topographical Aasistant, for mapping the Easton-Read- 

 ing range. 



Franklin Platt — Geologist in charge of tlie Survey of the coal fields ot 

 Tioga, Bradford, Potter, Lycoming, and Sullivan counties. 



W. G. Platt — Geologist in charge of the Survey of Armstrong and Jefferson 

 counties. 



R. H. Sanders — Topographical Assistant in Dauphin, Lebanon and Berks 

 counties. 



1. C. White — Geologist in charge of the Survey of Crawford and Erie coun- 

 ties. 



J. F. Carll — Geologist in charge of the Survey of the Oil Regions. 



H. M. Chance — Geologist in charge of the Survey of Clinton and Clarion 

 counties. 



C. A. Ashburner — Geologist in charge of the Survey of McKeau, Elk, Came- 

 ron and Forest counties. 



A. W. Sheafer — Assistant in McKean county, &g. 



F. A. Genth — Mineralogist and Chemist at Philadelphia. 

 F. A. Genth, Jr — Aid in the Laboratory. 



A. S. McCreath— Chemist, in charge of the Laboratory of the Survey, 223 



Market street, Harrisburg. 

 John M. Stinson— Aid in the Laboratory. 

 C. E. Hall— Geologist in charge of the Survey of Delaware county, and 



Palseontologist in charge of the Museum. 

 N. A. Stockton— Aid in the Museum. 

 M. G. Cabraher— Aid in the Museum. 

 Charles Allen— Assistant in locating outcrops in Delaware county, and 



for Records of Railroad and other Levels, Harrisburg. 

 H. C. Lewis— Volunteer geologist for the survey of the gravel deposits of 



south-eastern Pennsylvania. 

 Leo Lesquereux— Fossil Botanist, Columbus, Oliio. 



E. B. H ARDEN-Topographer in charge of Oflflce Work, &c. 1008 Clinton street, 

 Philadelphia. 



O. B. Harden- Assistant in preparing illustrations. 



F. W. FoRMAN— Clerk in charge of the Publications of the Survey, 223 Market 

 street, Harrisburg. 



