78 The Ohio Naturalist. [Vol. IV, No. 4, 



filled with old, dead leaves ! The channel is located near the 

 mouth of the gorge and is cut through Clinton limestone. Its 

 length is about one-half mile, its average width 125 feet, and its 

 present height above the river, 22 feet. This corresponds to the 

 depth of Prof. Claypole's drilling. In fact, all the evidence goes 

 to prove that this channel is preglacial and is now largely filled 

 with drift. At the head of the channel a ravine has cut a deep 

 trough, showing very nicel}' the character of the filling (boulder 

 clay). The owner of the land upon which the channel is located 

 says that at one time a large stump standing in the old channel 

 turned over and in the course of a few months disappeared 

 entirel}'. A few blulTs are to be seen at the lower end of the 

 channel, giving additional proof of its origin. 



Not long ago Prof. Bownocker worked out the history of this 

 river, but unfortunately overlooked this old channel. He has 

 traced, however, the old channel to within about a mile of this 

 one. So that this discovery simply extends the course of some 

 ancient river bed, whose course is being graduall}' mapped out. 



A terrace with an average height of about 30 feet was found in 

 the gorge. This would indicate, in the history of the present 

 stream, a general upward movement of the crust, in times past. 



The gorge itself is without doubt post-glacial. 



Note : The topographical map which accompanies this sketch was made 

 by Miss Alice Carr, Miss Gertrude Baker and Mr. R. O. Wead of the geology- 

 class of Antioch College. 



Antioch College. 



-a"- 



INDEX TO UREDINEOUS CULTURE EXPERIMENTS 



WITH LIST OF SPECIES AND HOSTS FOR 



NORTH AMERICA. 



W. A. KELI.ERMAN. 

 {Abstract.) 



Careful culture work to determine life histories of fungi or 

 cycles of development was initiated by De Bary in 1865. It was 

 continued by him in 1866 and in the same year also taken up by 

 Oersted and Woronin. A few years later other foreign botanists 

 engaged in similar work, and the list continued to the present 

 contains such additional names as Schroeter, Rostrup, Winter, 

 Schenk, Cornu, Plowright, Klehban, Hartig, Dietel, Barclay, 

 Fischer, Tubeuf, Soppit, Tranzschal, Eriksson, Pazschke, Juel, 

 Wagner, Bubak, Jacky, Shirai, Miiller and Ward. 



In America Dr. Farlow was the pioneer worker, publishing his 

 first experiments on the " Gymnosporangia or Cedar A]4)les of 

 the United States" in 1S80. He continued work on the same 

 group in 1885, and it was supplemented (independently) by Hal- 

 sted in 1886 7, published in the Bulletin of the Iowa Agricultural 



