Proceedings. 
997 
Afternoon Session , 2:30 o’clock. 
20. The viability of Bacterium diphtheriae. W. D. Frost , 
C. G. Davies and H. F. Helmhoh. 
21. The Attidae of Borneo. George W. and Elizabeth G. 
Peckham . (By title.) 
22. Experiments with caddis-fly larvae. W. S. Marshall. 
23. Notes on the behavior of Physa ancillaria. George 
Wagner. 
24. The psychology of linguistic development in the indi¬ 
vidual. M. V. O’Shea. 
25. The fluted stone axes of Wisconsin. C. E. Brown. 
26. The Greek and Persian armies at Thermopylae. A. G. 
Baird. (By title.) 
During the year 1904, the Academy has, suffered the loss of 
three valuable members. The members deceased are: 
Captain Erederick Pabst, president of the Pabst Brewing 
company, who died January 1, 1904, at his home in Milwau¬ 
kee. 
John I. Jegi, professor of physiology and psychology in the 
State Normal school at Milwaukee and a vice-president of the 
Academy, who died January 7, 1904. 
John Lendrum Mitchell, ex-TTnited States senator for Wis¬ 
consin and a life member of the Academy, who died at his 
country home near Milwaukee, June 30, 1904. 
A detailed account of the sessions is herewith given: 
Wednesday, December 28. 
Morning Session. 
The Academy was called to order at 10:30 by President 
Davis. The secretary announced that the minutes of the last 
meeting had been published in the Transactions. The read¬ 
ing of these minutes was therefore dispensed with. The re¬ 
port of the secretary, which is published below, was then read. 
The secretary reported that one serious obstacle in the way 
