IOWA ACADEMY OP SCIENCE 
3 
since the establishment of the State University Laboratory at Lake 
Okoboji. But is it not possible for us to spend some time at our own 
laboratories on the same or on correlated topics, and in time attain to 
a more comprehensive view of the natural history of the state. 
Respectfully submitted, 
L. S. ROSS, Secretary. 
PROGRAM OF THE IOWA ACADEMY OF SCIENCE. 
The sessions of the Academy were held in the Zoological Lecture Room in 
Blair Plall, Iowa College, Grinnell, beginning at 1:30 p. m., Friday, April 29th. 
The public address by Professor William A. Noyes of the University of 
Illinois, on “A Scientific Revolution,” was given Friday at 8:00 p. m., in the 
College Chapel. 
1. The Digestibility of Bleached Flour E. W. Rockwood 
2. The Effect of Continued Grinding on Water of Crystallization 
Nicholas Knight 
3. A Study in the Determination of Calcium George W. Helse 
(Introduction by W. S. Hendrixson.) 
4. A Notice on the Cast Iron Casing in Well 4 at Grinnell. W. S. Plendrixson 
5. The Iowa Lakeside Laboratory — Illustrated R. B. Wylie 
6. The Flower of Elodea — Illustrated R. B. Wylie 
7. Preliminary List of the Parasitic Fungi of Payette County, Iowa... 
Guy West Wilson 
8. Prairie Openings in the Forest B. Shimek 
9. The Influence of Air-Currents on Transpiration Miss Maud A. Brown 
(Introduced by B. Shimek.) 
10. Delayed Germination .L. H. Pammel and Charlotte M. King, 
11. The Problem of Weeds in the West L. H. Pammel 
12. Spore Formation in Lycogala Exiguum Henry S. Conard 
13. Some Geological Aspects of Artificial Drainage... G. G. Wheat 
14. The Pleistocene Record of the Simpson College Well John L. Tilton 
15. The Af Ionian Age of the Aftonian Mammalian Fauna Samuel Calvin 
16. Some Standardizing Tests of Stern’s Tone Variator R. H. Sylvester 
(Introduced by C. E. Seashore.) 
17. Discrimination Sensibility for Pitch Within the Tonal Range 
H. G. Schaefer 
(Introduced by C. E. Seashore.) 
18. The Technique of Pitch Discrimination Measurements C. E. Seashore 
19. Some Recent Discoveries Concerning Behavior of Platinum-Iridium 
Wires Lee P. Sieg 
(Introduced by A. G. Smith.) 
20. Concerning a Study of Kerosene Oils by Physical Methods.. G. W. Stewart 
(Introduced by A. G. Smith.) 
•21. Historical Sketch of Early Health Regulations in Iowa L. S. Ross 
