474 



D. 



PAGE 



Dryer, Charles R., The Physiography of Indianapolis 55 



Dwarfing Effect of Attacks of Mites of the Genus Eriophyes Upon 



Norway Maples, Howard E. Enders 79 



Disposition and Intelligence of the Chimpanzee, W. Henry Sheak. . 301 



E. 



Eigenmann, Carl H., The Pygidiidae 59 



An Epidemic Among the Fishes of Huffman's Lake, Will Scott. ... 67 

 Enders, Howard E., Dwarfing Effect of Attacks of Mites of the 



Genus Eriophyes Upon Norway Maples 79 



The Effect of Centrifugal Force on Plants, F. M. Andrews 175 



The Effect of Aeration of the Roots of Zea Mays, C. C. Beals 177 



The Injurious Effect of Borax in Fertilizers on Corn, S. D. Conner. . 195 

 Evans, P. N., Sulphur By-products of the Preparation of Ether. . . . 211 

 The Effect of Tobacco Smoke and of Methyl Iodide Vapor on the 



Growth of Certain Micro-organisms, C. A. Ludwig 217 



Energy Losses in Commercial Hammers, Edwin Morrison and Robert 



Petry 245 



Further Experiments with the Mutant, Scai'let, from Drosophila 



Repleta, Hobart Cromwell 287 



The Erdmann New Culture Medium for Protozoa, C. A. Behrens 



and H. C. Travelbee 297 



Evermann, Barton Warren, The Unionidae of Lake Maxinkuckee. . 251 



F. 



Fall Meeting, Minutes of 43 



Foresman, G. K., Sulphur By-products of the Preparation of Ether 211 

 Where Feeble-minded Are Self-supporting, Hazel Hansford 85 



G. 



Germinal Changes in the Bar-eyed Race of Drosophila, Chas. Zeleny 73 

 Gast, W. K., Chemical Estimation of the Fertility of Soils in Fulton 



County, Indiana 201 



H. 



Hunting Wild Birds— Penalty 10 



Hansford, Hazel, Where the Feeble-minded are Self-supporting.... 85 

 Hess, Walter N., A Seasonal Study of the Kidney of the Five-spined 



Stickleback 295 



Heimlich, Louis F., The Trees of White County, Indiana 387 



