PAGE 



Ecological Notes- oa Certain White Kiver Algae. Paul Weatherwax. . . 107 



Aplianoniyces Pbycopliilns De Bary. Paul Weatherwax 100 



Inheritance of the Length of Life in Drosopliila Ampelophila. Roscoe 



R. Hyde 113 



The Germination of Seeds of Arisaema. F. L. Pickett 125 



Studies of Camptosorus Rhizophyllus, an Abstract of the Development 

 of the Prothalliuni of Camptosorus Rhizophyllus, and the Resist- 

 ance of the Prothallia of Camptosorus Rhizophyllus to Desiccation. 



F. L. Pickett 129 



Iri-sh Potato Scab (Oospora Scabies) as Affected by Fertilizers Con- 

 taining Sulphates and Chlorides. S. D. Conner 131 



Wabash Studies, V. Topogi-aphic Map of the Terre Haute Area. 



Chas. R. Dryer 1.39 



Center of Area and Center of Population of Indiana. W. A. Cogshall. . 141 



The Shrinkage of Photo-craphic Papei*. R. R. Ramsey 143 



Acyl Derivatives of 0-Amin<>phenol. J. H. Ransom and R. E. Nelson. 145 

 Boiling and Condensing Points of Alcohol Water Mixtures. P. N. 



Evans 151 



On the General Solution and So-Called Special Solutions of Linear 



Non-homogeneous Partial Differential Equations. L. L. Steimley. 157 



A Modified Permeanieter. Edwin Morrison and B. D. Morris 159 



Sanitary Survey of Indiana Rivers. Jay A. Craven, C. E 167 



The Relation of I^akes to Floods, with Special Reference to Certain 



Lakes and Streams of Indiana. Will Scott 173 



First Steps in Indiana Forestry. Stanley Coulter 189 



The Taxation of Forest Lands In Indiana. II. W. Anderson 197 



Forests and Floods. F. M. Andrews 203 



The Relation of County Tuberculosis llosjiitals to Conservation of 



Public Health. James Y. Welborn, M. I) 213 



Playgrounds and Recreation Centers as Factors in Conservation of 



Human Life. Dr. W. A. Gekler 215 



Public Toilets, Public Driking Fountains and I'ublif Spitting in rela- 

 tion to the Conservation of Human Life. C. M. Ililliard 219 



Power Economy in the Southern Indiana Quarry Industry. G. C. 



Manee 223 



Report of the Committee on "A List of tlie Scientific and Technical 



Serials in the Libraries of the State of Indiana" 237 



List of Scientific and Technical Serials in the Libraries of Indiana. . . . 240 



