IOWA ACADEMY OF SCIENCE 5 



OFFICERS FOR THE YEAR 1911-12. 



President L. Begeman 



First Vice President A. A. Bennett 



Second Vice President C. N. Kinney 



Secretary L- S. Ross 



Treasurer C- F. Kay 



EXECUTIVE COMMITTEE. 



ExjOfflcio—L. Begeman, A. A. Bennett, C. N. Kinney, L. S. Ross, G. F. Kay. 

 Elective— H. S. Conard, B. H. Bailey, H. M. Kelley. 



PROGRAM. 



The sessions of tlie Academy were held in Room 127, Carnegie Science Hall, 

 Coe College, Cedar Rapids, beginning at 1:30' p. m., Friday, April 28. 



The public address by Dr. Edward L. Nichols of Cornell University, on "The 

 Ends of the Spectrum — The Infra-Red and the Ultra-Violet," was given Friday 

 at 8:00 p. m., in the auditorium of Marshall Hall. 



Nitrogen in Rain and Snow Nicholas Knight 



Asteroid, 1909, JA Seth Nicholson and Alma Stotts 



(Introduced by D. W. Morehouse.) 



Vaccination Against Typhoid Fever Henry Albert 



Flowers of Story County J. M. Lindly 



The Succession of Floras on the Sand Dunes of Iowa B. Shimek 



A discussion of the changes of the earliest flora of these dunes, 

 consisting largely of leguminose plants, to the typical prairie flora 

 of the older areas. 



The Nebraskan Drift B. Shimek 



A discussion of its distril)Ution and correlation, including the 

 results of recent investigations. The conclusion is reached that this 

 drift cannot be correlated with the Jerseyan and Albertan, and that 

 the name "Kansan" should not be transferred to it. 



Notes on Fungus Diseases L. H. Pammel 



Gives a record of a very destructive Exoascus upon the hard 

 maple in the Rocky mountains, also an account of the destructive 

 Exoasciis on the oak, the destructive Fomes Iginarius on the quaking 

 aspen in some parts of the Wasatch mountains in Utah, as well as the 

 destructive work of Pleurotus upon the box elder and other deciduous 

 trees in Iowa. 



Notes on the Pollination and Variation of Red Clover (Trifolium Pratensc) 



L. H. Pammel and Charlotte M. King 



Giving notes on the more important insects that pollinate the red 

 clover in the state of Iowa and their relation to fertility ; compares 

 the amount of seeds produced per head and the number of flowers, 

 showing an extreme variation. 



