ASSISTAxXTS IN 1883. 



Professor I. C. White, geologist, in Huntingdon county; address Morgan- 

 town, W. V. 



Mr. E. V. DInvillikrs, geologist, in Centre county; 711 Walnut street, 

 Philadelphia. 



Mr. A. E. Lkhman, geologist, in Cumberland and York counties; 711 Walnut 

 street, Philadelphia. 



Dr. H. Martyn Chance, geologist, in Clearfield county; 2423 Fairmount 

 Avenue, Philadelphia. 



Profe&sor E. W. Claypole, geologist, in Perry and Juniata counties; address 

 in future, Akron, O. 



Mr. J. Sutton Wall, M. E., Monongahela city. Pa. 



Mr. A. S. McCreath, chemist; 223 Market street, Harrisburg. 



Mr. Leo Lesquerecx, fossil botanist; Columbus, Ohio. 



Mr. E. B. Harden, topographer, in charge of illustrations for reports, and 

 general correspondence at head- quarters; 905 Walnut street, Philadelphia. 



Anthracite Survey. 



Mr. Chas. a. Ashburner, geologist, in charge of the Survey of the An- 

 thracite coal fields; headquarters, address 907 Walnut street, Philadelphia. 



Mr. Charles B. Scott, assistant and secretary, Philadelphia office. 



Mr. O. B. Harden, topographer and artist, Philadelphia office. 



Mr. Frank A. Hill, assistant geologist, in the Northern Coal Field; Scranton, 

 Pa. 



Mr. John C. Branner, topographer, in the Northern Coal Field ; Scranton, 



Pa. 

 Mr. T. J. Williams, assistant, in the Northern Coal Field; Scranton, Pa. 

 Mr. A. D. W. Smith, aid, in the Northern Coal.Field ; Scranton Pa. 

 Mr. Arthur Winslow, as.sistant geologist, in the Eastern Middle Coal Field ; 



Philadelphia oflBce. 



Mr. William Griffith, assistant, in the Eastern Middle Coal Field; Pitts- 

 ton, Pa. 



Mr. Bard Wells, assistant geologist, in the Western Middle Coal Field ; 



Pottsville, Pa. 

 Mr. H. N. Sims, assistant, in the Western Middle Coal Field ; Pottsville, Pa. 

 Mr. Baird Halberstadt, aid, in Western Middle Coal Field ; Pottsville, Pa. 



