4 
IOWA ACADEMY OF SCIENCE 
NAMES OF THOSE IN ATTENDANCE. 
M. F. Arey, W. E. Anderson, T. R. Ball, J. A. Baber, F. C. Brown, 
Fred Berninghausen, R. E. Buchanan, T. J. Burrill, C. E. Bartholomew, 
A. L. Bakke, Perry A. Bond, Henry S. Conard, E. J. Cable, James A. 
Cass, A. W. Box, Paul H. Dike, H. L. Dodge, W. H. Davis, Wesley 
Creene, J. E. Guthrie, Ira N. Gabrielson, R. W. Getchell, Ada Hayden, 
S. F. Hersey, E. A. Jenner, C. N. Kinney, Wm. Kunerth, Charlotte M. 
King, G. F. Kay, James PI. Lees, D. W. Morehouse, J. N. Martin, Ray 
E. Neidig, L. H. Pammel, Herbert J. Plagge, F. W. Paige, J. N. Pearce, 
L. S. Ross, H. E. Summers, L. B. Spinney, T. C. Stevens, L. P. Seig, Har- 
old Stiles, W. H. Stevenson, G. W. Stewart, F. C. Stanley, Dayton 
Stoner, John L. Tilton, E. W. Wentworth, R. L. Webster, Fred R. York. 
PROGRAM. 
The meetings of the Academy were held in Alumni Hall, Iowa State 
College, Ames, beginning at 1 :30 p. m., Friday, April 25. A business 
meeting was held, after which scientific papers were read. The time 
Saturday forenoon was occupied with the presentation of the remaining 
scientific papers and with the final business meeting. 
President Pearson of the Iowa State College extended a welcome to the 
Academy at 8 :00 p. m., Friday. After this the public address on “ Wealth 
from Worthlessness” w T as given by Dr. Thomas J. Burrill, Professor 
Emeritus of Botany, University of Illinois. 
A reception was given to the members of the Academy and friends 
after the address. 
TITLES OF PAPERS PRESENTED. 
The Contamination of Public Water Supplies Through Fissures in 
Rocks Henry Albert 
Bacterial Activities of Crop Production P. E. Brown 
Tramping About Puget Sound T. H. Macbride 
The Conifers of Monterey Peninsula T. H. Macbride 
The Diclinous Flowers of Iva Xanthiifolia Clifford H. Farr 
(Introduced by R. B. Wylie) 
Pure Lines and What They Mean to Iowa’s Grain Crop L. C. Burnett 
Quercus borealis Michx. f B. Shimek 
The Sedges of Henry County, Iowa John T. Bucholz 
The Effect of Smoke and Gases Upon Vegetation A. L. Bakke 
