PAGE . 



The Work Done bj' Normal Brook in Thirteen Years. Charles R. Dryer 



and Melvin K. Davis 147 



Paleolithic, Neolithic, Copper and Iron Ages of Shelby County, Indiana. 



F. W. Gottlieb 153 



The Effects of Ice in Lakes upon the Shore Lines of the Same. Albert B. 



Reagan 119 



A New Bed of Trilobites. Andrew J. Bigney ,. . . . 139 



The Fauna of the Brazil liimestone. F. C. Greene 169 



The Preparation of Ether. P. N. Evans 173 



The Temperature Coefficient of the Surface Tension of Water. Arthur 



L. Foley 175 



LaPlace's Theory of Capillarity. Arthur L. Foley 181 



The Value at Low Temperatures of the Specific Heats of a Gas. CM. 



Smith 183 



Investigations Concerning the Reichert-Meissl Number and The Relation 



of Butter Fat Constants in Butter Analysis. George Spitzer. 195 



A Convenient Laboratory Device. J. P. Naylor 201 



Some Anomalies in the Gametophyte of Dryopteris stipularis. Caroline 



A. Black 321 



Indiana Fungi. J. M. Van Hook 205 



Steccherinum septentrionale (Fr.) Banker in Indiana. Howard J. Banker. 213 



Disease Resistance in Varieties of Potatoes. C. R. Orton 219 



An Ecological Survey of the Lower Whitewater Gorge. L. C. Petry 



and M. S. Markle 223 



Report of Work on Corn Pollination II. M. L. Fisher 245 



Crustacea of Winona Lake. John L. House 129 



A Method by which Cover Glasses may be used on Golgi Slides. D. W. 



Dennis : . 135 



A Tropical Reptile near Richmond. D. W. Dennis 137 



Further Notes, on Timothy Rust. A. G. Johnson 203 



An Investigation of a Point Discharge in Magnetic and Electrostatic 



Fields. Oscar William Silvey 247 



The Preglacial Valleys of the Upper Mississippi and its Eastern Tribu- 

 taries. Harry M. Clem 335 



Determination of the Ratio of Specific Heats of Dry Air. E. K. Chap- 

 man 289 



