1408 Wisconsin Academy of Sciences, Arts, and Letters. 
FORTY-FIRST ANNUAL MEETING 
The meeting was held in conjunction with the Wisconsin 
Archeological Society, the Wisconsin Mycological Society, and 
the Wisconsin Natural History Society, in Madison, February 
16 and 17, 1911. 
The sessions were held in the Lecture Room of the State His¬ 
torical Society. The following program was presented, Presi¬ 
dent Plantz in the chair: 
Thursday, February 16. 
Morning Session, 10:00 o'clock. 
Preliminary., Business. 
Presentation of Papers. 
1. The Relation between Area and Temperature of Lakes. Ed¬ 
ward A. Birge. Twenty minutes. 
2. On Lepisosteus sinensis, Bleeker. George Wagner. Five min¬ 
utes. 
3. On the Whitefish of Green Lake. George Wagner. Five 
minutes. 
4. A Trematode Parasite of the English Sparrow in the United 
States. Leon J. Cole. Ten minutes. 
5. Apparent Mutations in the Meadow Vole ( Microtus pennsyl- 
vanicus. Leon J. Cole and George Wagner. Ten minutes. 
6. The Nests and Larvae of Necturus. B. G. Smith. Ten minutes. 
7. Pholiotas of the Region of the Great Lakes. Edward T. Harper. 
(By title.) 
8. The Effect of Poisons on Sap Flow. J. B. Overton. Ten min¬ 
utes. 
9. The Structure and Cell Development of the Root Tip of a Sedge. 
A. B. Stout. Ten minutes. 
10. Temperature in Relation to Infection with Certain Downy Mil¬ 
dews. I. E. Melhus. Fifteen minutes. 
11. Nuclear Phenomena in the Tremellineae. E. M. Gilbert. Ten 
minutes. 
12. The Structure and Development of Collema crispa. Freda M. 
Bachman. Ten minutes. 
13. The Structure of the Central Body in the Trout. W. G. Mar¬ 
quette. Fifteen minutes. 
14. The Cilia-forming Organ of Motile Plant Cells. C. E. Allen. 
Ten minutes. 
15. Studies on Some Lakes in Central America. Cbancey Juday. 
Ten minutes. 
