OF DENISON UNIVERSITY 45 



Part III. A Preglacial Tributary to Paint Creek and its Re- 

 lation to the Beech Flats of Pike County, Ohio. (Plate II.) 

 W. G. Tight... 25-30 



Part II. 



With n Plates and 5 Cuts. 



I. Wax ModelingTrom Microscopic Sections. By \V. E. Wells, 



Graduate in Biology, Denison University 3-7 



II. Electrical Waves in Long Parallel Wires. By A. D. Cole, Profes- 

 sor of Physics and Chemistry of Denison University S-17 



III. Changes in Drainage in Southern Ohio. By Frank Leverett, Mem- 



ber United States Geological Survey 18-21 



IV. Some Preglacial Drainage Features of Southern Ohio. By W. G. 



Tight, Professor of Geology and Natural History of Denison 

 University 22-32 



V. A Preglacial Valley in Fairfield County. By W. G. Tight, Profes- 



sor of Geology and Natural History of Denison University 33-37 



Vol. X will include, besides the matter herein contained, a sup- 

 plement consisting of a complete index to the first ten volumes. It 

 has been decided hereafter to publish the Bulletin by articles, making 

 a volume to include as nearly 500 pages as is convenient and to close 

 with an index. The advantages of this method are believed to out- 

 weigh those of the present form of publication. 



Besides furnishing a ready and convenient means of publication, 

 the Bulletin is also of great value to the Scientific Association and the 

 University through the large amount of valuable scientific literature 

 which is received in exchange and part of which could be secured in 

 no other way. It is not possible in the limits of this article to give any 

 adequate list of the material which has been added already to our li- 

 brary in this way. Some idea can be gained however from the ex- 

 change list. This will show also the wide distribution which the Bulle- 

 tin receives Most of these organizations favor us with their entire list 

 of publications, often consisting of several series. 



EXCHANGE LIST OF THE BULLETIN. 



AMERICA (NORTH.) 



united states. 

 Albany, N. Y., 



State Library. 

 Amherst, Mass., 



Amherst College, Scientific Department. 

 Baltimore, Md., 



Biological Laboratories, Johns Hopkins University. 



