66 



ment is indicated. When no antliority is given tlie autlior is responsible 

 for the data. 



Tlie following is a list of observers most quoted. Their initials are 

 used to indicate their authority. 



V. H. Barnett. 



W. S. Blatchley. 



C. H. Bollman. 



C. H. Eigenmann. 



B. W. E'vermann. 

 W. L. Hahn. 



P. J. Hartman. 



C. H. Kennedy. 

 E. M. Kindle. 

 C. G. Littell. 

 W. L. McAfee. 

 N. B. Myers. 

 A. B. Ulrey. 



G. G. Williamson. 



When other authorities are quoted their names are given in full. 



To make the facts contained in this paper more readily accessible to 

 teachers and students they have been placed in tabular form and ap- 

 pear at the end of the paper. The table and the index were prepand liy 

 C. H. Frazee and Leonard Haseman. 



The region over which oliservations have lieen made, embracing tlie 

 territory within about tive miles of Bloomington, is varied in its topogra- 

 phy. On the cast and nortli are many rocliy ravines, some of tlr.'ni contain- 

 ing cascades. At Bloominglon, to the soutli of ii and some disiauce to tliL* 

 west the surface is gently rolling iiinl lias typical features of the oolitic 

 limestone area of Indiana. To tlie wist in the Mitchell limc>stone area 

 the surface is pitted with various sinkluiU's l:eiieath which are caves of 

 considerable extent. Bloomingioii and the area about it are well drained 

 by rock bound brooks running in part to the north through Rocky Branch, 

 Grifify Creek and Bean Blossom, finally Hewing into the North Fork of 

 White River. Other brooks, the Jordan River and Clear Creek drain the 

 southern part of Bloomington through Clear Creek into the East Fork of 

 White River. The extreme eastern part of the area is drained into Salt 

 Creek and-' thence into the East Fork of \>'liite River. The western part 



