IOWA ACADEMY OF SCIENCES. 21 



It is respectfully recommended that the committee on a pure food law be 

 continued in order that this important question may be kept before the 

 people of Iowa. 



Respectfully submitted, 



J. B. Weems, Chairman. 

 C. O. Bates. 

 Maurice Ricker. 

 Nicholas Knight. 

 W. S. Hendrix^on, 



On Wednesday evening, December 3 1st, the members of 

 the academy had the privilege of listening to an illustrated 

 lecture by Professor T. H. Macbride on the subject "The 

 Desert of Sonora. " The lecture was given under the joint 

 auspices of the academy and the science teachers' round 

 table of the State Teachers' Association. 



At the literary sessions the following papers were pre- 

 sented: 



The presidential address, ''Some Problems of Heredity and Evolu- 

 tion." — H. E. Summers. 



' 'Some Ecological Notes on the Vegetation of the Uintah Mountains." — 

 L. H. Pammel. 



"Living Plants as Geological Factors." — B. Shimek. 



''The Solar Surface During the Past Twelve Years." — David E. 

 Hadden. 



' 'The Origin of the Lignites of North Dakota."— Frank A. Wilder. 



' 'Smallpox in the Public Schools. " — L. H. Ford. 



''Notes from the Chemical Laboratory of Cornell College." 



''A Study of Psychopathic Heredity." — W. E. Sanders. 



''Some Observations upon the Action of Coherers when Subjected to 

 Direct Electromotive Force." — Frank L. Almy. 



''The Accretion of Flood Plains by Means of Sand Bars." — Howard E. 

 Simpson. 



''The Duck Hawk {Falco peregrinus anatum) in Iowa." — B. H. Bailev. 



''The Membrane Bones in the Skull of a Young Amphiuma."— H. W. 

 Norris. 



"The Preparation of Phenylether." — A. N. Cook. 



"The Sioux L'ity Water Supply."— A. N. Cook and W, J. Morgan. 



' 'Significance of the Occurrence of Minute Quantities of Metallic Min- 

 erals in Rocks." — C. R. Keyes. 



■'Genesis of Certain Cherts." — C. R. Keyes. 



The ChemicalJComposition of Nuts Used as Food." — J. B. Weems and 

 Alice W. Hess. 



"The Preparation of jAmmonia Free Water for Water Analysis." — J. B. 

 Weems and E. C. Myers. 



"The Toledo Lobe of the lowan Drift."— T. E. Savage. 



"The Scrophulariaceae of Iowa." — T. J. and M. F. L. Fitzpatrick, 



