IOWA ACADEMY OF SCIENCE 
PROGRAM. 
The sessions of the Academy were held in the Art Gallery, Historical Build- 
ing, Des Mnines, , beginning- at 1:30 p. m., Friday, April 26. The business 
meeting was followed by the President’s Address, on “The Mission and Spirit 
of the Pure Scientist.” 
The Anniversary banquet was held at the Chamberlain Hotel, 6:30 p. m., 
Friday. Brief responses were given by the visiting representatives from other 
scientific societies. At 8:00 o’clock the doors of the banquet hall were opened 
for all wishing to hear the Address on Charter Members, by Professor L. H. 
Pammel, and the Anniversary Address by Professor Herbert Osborn of Ohio 
State University. 
Saturday forenoon session was in the Historical Building. The entire time 
was given to the presentation of papers on the “Development of the Sciences 
in Iowa During the Past Twenty-five Years.” 
Botany Professor T. H. McBride 
Chemistry Professor W. S. Hendrixson 
Geology Professor M. F. Arey 
Physics Professor P. P. Almy 
Zoology Professor C. C. Nutting 
Pinal business meeting and adjournment. 
SCIENTIFIC PAPERS. 
Behavior of Pollen Tubes in Richardia Africana James Ellis Gow 
An Anomalous Ovary James Ellis Gow 
Aroid Notes James Ellis Gow 
The Late Blight of Barley — Helminthosporium Teres Sacc A. L. Bakke 
/Some Points on the Ploral D'evelopment of Red Clover (Trifolium Pratense) 
J. N. Martin 
(Introduced by L. H. Pammel.) 
Native Dye-Plants and Tan-Plants of Iowa with Notes on a Pew Other 
Species Harriette S. Kellogg 
The Genus Lycoperdon as Represented in the Herbarium of the State 
University of Iowa N. D. Knupp 
Perns and Liverworts of Grinnell and Vicinity H. S. Conard 
Secotium Agaricoides, A Stalked Puffball .H. S. Conard 
Simblum Sphaerocephalum in Iowa H. S. Conard 
Notes on Heteranthera dubia R. B. Wylie 
Notes on Some Parasitic Pungi Chiefly from the Bitter Root Mountains.. 
L. H. Pammel and Ella Grace Harvey 
The Effect of Continued Grinding on the Water of Crystallization, (Second 
Paper) Nicholas Knight 
Velocity Coefflcients of the Reaction Between Ethyl Iodide and Silver Nitrate 
in Ethyl and Methyl Alcohol and in Mixtures of These Solvents 
O. M. Weigle and J. N. Pearce 
