1348 Wisconsin Academy of Sciences, Arts, and Letters. 
waukee for the interest they have shown in this meeting and to 
the objects for which these Associations stand; 
“3—, To the Milwaukee Public Museum and Library for 
kindly courtesies and the excellent facilities furnished for these 
meetings. 
“Dr. C. E. Allen being obliged to tender his resignation as 
Secretary, the Wisconsin Academy of Sciences, Arts and Let¬ 
ters wishes to express its deep appreciation of the very efficient 
and extremely valuable service he has rendered during his term 
of office and to express its profound regret that these official 
relations are now to be terminated.” 
The meeting then adjourned. 
THIRTY-NINTH ANNUAL MEETING 
In conjunction with the Wisconsin Section of the American 
Chemical Society, Madison, Wisconsin, February 11-12, T909. 
February 11th. 
Morning Session. 
The meeting was called to order at 9 a. m. by President Kah- 
lenberg. After the reading of general announcements for the 
meetings, the remainder of the morning session was turned over 
to the Wisconsin Section of the American Chemical Society, the 
following papers being read: 
1. The replacement of metals by one another in non-aqueous 
solutions. 10 minutes. CJias. B. Gates. 
2. The physical constants of ethyl tri-borate. 10 minutes. 
Robert K. Brewer. 
3. Analysis of some Wisconsin zircons. 5 minutes. By 
title. R. D. Hall. 
4. The liberation of hydrochloric acid from sodium chloride 
by weak dibasic acids. 10 minutes. R. B. Dunlevy. 
5. Osmotic experiments with collodion membranes. 10 min¬ 
utes. J. Howard Mathews. 
