A CENTURY OF GEOLOGY IN INDIANA. 163 



also a paper entitled "The Drift of the Wabash-Erie Region," accompanied 

 by a map of the "Drift Deposits of Northeastern Indiana." This is a sum- 

 mary of the results of his study of the drift in the six counties surveyed by 

 him for the Thompson-Gorby reports, viz., Allen, DeKalb, Whitley, Steuben, 

 Noble and LaGrange, in the order mentioned. Taken as a whole, the work of 

 Dryer as set forth in these reports is the most accurate and valuable exposi- 

 tion extant of the great drift region of northeastern Indiana. 



The report on Noble County was accompanied by a paper on the flora of 

 the county by W. B. Van Gorder, which lists, with notes on local distribution, 

 724 species, representing 363 genera. 



Another paper in the volume of value at the time it appeared, especially 

 to those interested in the search for Trenton Rock gas and oil, is that of E. 

 P. Cubberly, entitled "Indiana's structural Features as Revealed by the Drill." 

 From the records of hundreds of bores put down in the State in search of 

 these bitumens, Cubberly prepared 16 colored sections on a horizontal scale 

 of 30 miles and a vertical scale of 500 feet to the inch, each crossing a different 

 portion of the State. Each section showed the relative depth and thickness 

 of each of the geological formations of the State at certain points along 

 its course, and thus enabled one to determine the different elevations or 

 depressions of the Trenton Rock referred to sea level. 



The final paper, as usual, was by S. A. Miller, on paleontology. It was 

 illustrated with 12 plates, and descriptive wholly of new species of different 

 families of fossils, many from outside the State. Seven were named in honor 

 of Gorby, four after Greene and three each after Benedict and Collett. 



Third Report of Gorby. 



During his six years' service as State Geologist, Gorby issued but three 

 reports. The third, which appeared in 1894, contains 296 pages, and com- 

 prises a paper on the "Geology of Cass County" by ELrod and Benedict, 

 the reports of the Inspectors of Mines, Gas and Oil, and a paper of 150 pages 

 entitled "The Lampreys and Fishes of Indiana," by Dr. O. P. Hay. The latter 

 was a valuable contribution to the zoological literature of the State, giving 

 keys, full descriptions, distribution, feeding habits and food value of the 150 

 species of lampreys and fishes found in Indiana. 



Miscellaneous Work From 1869 to 1910. 



Before taking up the work accomplished by the Department of Geology 

 from 1895 to date, we wiU mention briefly some of that done in the State by 

 individuals not connected with the Department, between the beginning of 

 the Cox Survey and 1910. The papers published during the first ten years of 

 this period were mostly archaeological rather than geological in nature. One 

 entitled "Mounds at Merom and Hutsonville on the Wabash," by F. W. 

 Putnam, appeared in the Proceedings of the Boston Society of Natural 



