TABLE OF CONTENTS. 



PAGE 



Mason B'ancliard Thomas 4 



An Act to Provide for the Publication of the Reports and Pai)ers of the 



Indiana Academy of Science 9 



An Act for the Protection of Birds, Their Xests and Eggs 11 



Indiana Academy of Science Oilicers, 1911-1912 12 



Constitution 15 



Members IS 



Minutes of Spring Meeting, Terre Haute, Indiana, May 11, 12 and 13, 191 1 27 



Minutes of the Twenty-Seventh Annual Meeting 29 



Program of the Twenty-Seventh Annual Meeting 33 



President's Address. By Charles Redway Dryer. The North America 



of Today and Tomorrow and Indiana's Place in It 37 



Chemical Notes on Ventilation. By Percy Norton Evans 55 



An Indiana Shell Mound. By W. S. Blatchley 01 



Maternal Impression. A. G. Pohlman, Indiana University 65 



Terraces of the Whitewater River Near Richmond, Indiana. By Allen 



David Hole "1 



Some Neglected Principles of Physiography. .\. H. Purdue 83 



Conservation of the Soil in Dearborn County. .\. J. Bigney S9 



The ElTect of Deforestation Upon the Water Level of Montgomery County. 



H. L. Barr 91 



The Geological Conditions of Municipal Water Sui)ply in tlio Driftless 



Area of Southern Indiana. By E. R. Cumings Ill 



A Note on the Batostomas of the Richmond Series. By E. R. Cmnings 



and J. J. Galloway 147 



Observations, Having for Their Object the Appro.ximate Determination of 



the Time Required for the Erosion of Clifly and Butler Ravines in 



JefTerson County, Ind. Glenn Culbertson, Hanover, Indiana 109 



The Occurrence of Hand-Specimens of .loinlcd Structure in the New Albany 



Shale. Glenn Culbertson, Hanover, Ind 171 



Results of Glaciation in Indiana. By Charles W. Shannon 173 



The S.and Areas ot Indiana. Hv ("has. W. Sliannon. 197 



