IOWA ACADEMY OF SCIENCES. 19 



The state should not remain an open field for imposing adulterated food 



products upon our citizens to the detriment of both health and pocketbooks. 



Neighboring states are in advance of Iowa on this subject and the time is 



ripe for our state to take the position which rightly belongs to it in order 



that the citizens may be protected. 



J. B. Wehms, 

 CO, Bates, 

 W. S. Hendrixson, 

 Nicholas Knight, 

 Maurice Ricker. 



At the literary session the following papers were pre- 

 sented: 



The presidential address, ' 'The Relation of Physics to the Other Material 

 Sciences." — A. A. Veblen. 



1. "The Effect of Changes in Temperature on the Index of Refraction of 

 a Gas when Heated at Constant Volume." — N. F. Smith. (Introduced by 

 W. S. Hendrixson.) 



2. ' 'Forestry in Iowa." — B. Shimek. 



3. "Some New Double Bromides and their Dissociation in Aqueous 

 Solution." — Nicholas Knight 



4. "Character of the Devonian Hiatus in the Continental Interior." — 

 Charles R. Keyes. 



5. ' 'Evidences of Recent Uprisings of the Shores of the Black Sea." — 

 Charles R. Keyes. 



6. ''Igneous Rocks of the Central Caucasus; and the Recent Work of 

 Loewinson-Lessing. " — Charles R Keyes. 



7. "New and Interesting Species of the Flora of Iowa." — T. J. and 

 M. F. L. Fitzpatrick. 



8. "The Liliaceae of Iowa."— T. M. and M. F. L. Fitzpatrick. 



9. ''The Scrophulariacae of Iowa." — T. J. and M. F. L. Fitzpatrick. 



10. ''A Ruling Engine for making Zone-plates." — W. M. Boehm. 

 (Introduced by A. A. Veblen.) 



11. ''Some Improved Laboratory Devices and Apparatus." — A. A. 

 Veblen. 



12. "A Study in Hereditary Transmission of the Papillary Finger Pat- 

 terns." — A. A. Veblen. 



13. "The Biological Station of the University of Montana." — Maurice 

 Ricker. 



14. "A Large Red Hydri " — Maurice Ricker. 



15. ''Nearcric Species of Acanthiidae. " — H. E. Summers and Char- 

 lotte M. King. 



16. ' ' Nearctic Scutelleridae. " — H E. Summers. 



17. ' 'Notes on the Physiographic Ecology and Distribution of Plants in 

 Western Iowa, Especially of the Loess." — L. H. Pammel. 



18. "Notes on Ferns from Iowa and Western Wisconsin, and South- 

 eastern Minnesota, Chiefly in the Herbarium of the Iowa State College." — 

 L. H. Pammel and Charlotte M. King. 



19. "A List of Plants Collected in Lee County, Florida."— A. S. 

 Hitchcock. 



