TABLE OF CONTEXTS. 



PAGE 



Mason Blanchard Thomas 4 



An Act to Provide for the Publication of the Reports and Papers of the 



Indiana Academj- of Science 9 



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



Indiana Academy of Science Oihcers, 1911-1912 12 



Constitution 15 



Members 18 



Minutes of Spring Meeting, Terre Haute, Indiana, May 11, 12 and 13, 1911 . 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 Note.-i 6n N'entilation. By Percy Norton Evans 55 



An Indiana Shell Mound. By \V. S. Blatchley 61 



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



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



David Hole 71 



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



Conservation of the Soil in Dearborn Count}-. A. J. Bigney 89 



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



H. L. Barr 91 



The Geological Conditions of Municipal Water Supply in the Driftless 



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



A Note on the Batostomas of the Richmond Series. Bj' E. R. Cumings 



and J. J. Galloway 147 



Observations, Having for Their Object the Approximate Determination of 



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



Jefferson Coimty, Ind. Glenn Culbertson, Hanover, Indiana 169 



The Occurrence of Hand-Specimens of Jointed Structure in the New Albany 



Shale. Glenn Culbertson, Hanover, Ind 171 



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



The Sand Areas ot Indiana. Bv Chas. W. Shannon 197 



