1880. 

 ASSISTANT GEOLOGISTS. 



Persifor Frazer, Jr. — Geologist in charge of the Survey' of Adanis, Yorlt, 

 Lancaster and Chester counties. 



AMBROSE E. Lehman — Topograjjliical Assistant, for mapping the South 

 Mountain. 



Frederick Prime, Jr. — Geologist in charge of tlie Survey of Northampton, 

 Lehigh, and Berks counties. 



E. V. d'Invilliers — Topographical Assistant, for mapping the Easton-Read- 

 ing range. 



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

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



W. G. PiiATT — Geologist in charge of tlie Survey of Armstrong and Jeflerson 

 counties. 



R. H. Sanders — Topographical Assistant in Dauj^hin, LeV>anon and Berks 

 counties. 



I. 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. Sheaper — Assistant in McKean county, &c. 

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

 F. A. Genth, Jr — Aid in the Laborator3^ 



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 

 Palaeontologist in charge of the Museum. 



N. A. Stockton — Aid in the Museum. 



M. G. Carraher— 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 Lesquerettx— Fossil Botanist, Columbus, Ohio. 



E. B. Harden— Topographer in charge of Office Work, <fec. 1008 Clinton street, 

 Philadelphia. 



O. B. Harden— Assistant in preparing illustrations. 



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

 street, Harrisburg. 



