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WILLIAM HERBERT HOBBS 



over the water courses. Striking examples of this kind are furnished 

 by Figs. 3-5 and 4, while Fig. 5 brings out with special clearness 

 the dominant rectangular system which is developed on the shore 

 of Cayuga Lake. 



This region about the lakes in western New York has been 

 made the subject of many papers, owing to its topographic peculiarities 

 and the curious distribution of the lakes themselves. Among the 



Fig. 4. — Control of direction of water course by joint planes within the basin 

 of Cayuga Lake. (Photograph furnished by Professor R. S. Tarr.) 



more important of these are papers by Lincoln, 1 Brigham, 2 Tarr, 3 

 and Dryer. 4 



In these papers the peculiar topography of the lake basins is, on 

 the one hand, ascribed to sub-aerial water erosion, and, on the other 



1 D. F. Lincoln, "Glaciation in the Finger Lakes Region of New York," American 

 Journal of Science (3), Vol. XLIV (1892), pp. 290-301. 



2 Albert P. Brigham,. "The Finger Lakes of New York," Bulletin of the American 

 Geographical Society, Vol. XXV (1893), pp. 203-23. 



3 Ralph S. Tarr, "Lake Cayuga, a Rock Basin," Bulletin of the Geological Society 

 of America, Vol. V (1894), pp. 339-56, Plate XIV. 



4 Charles R. Dryer, "Finger Lakes Region of Western New York," ibid., Vol. 

 XV. dd. 449-60, Plates 37-41. 



