Proceedings . 
1011 
A. That the exchange committee he authorized to dispose 
of the duplicates and separata in the Academy library, in such 
manner and to snch an extent as may appear advantageous to 
the Academy, and to carry out such exchanges with the Univer¬ 
sity libraries and the State Historical society as may appear 
similarly advantageous. 
B. That there be appropriated from the funds of the Acad¬ 
emy two hundred dollars, or such part thereof as may in the 
opinion of the secretary and treasurer be available, for the 
work of this committee and the purchase of needed volumes 
or parts of volumes; provided, that no part of this sum shall 
be taken from the principal of the invested fimds of the Acad¬ 
emy. 
C. That this committee be further allowed to use any sums 
for this work that may be realized by the sale of duplicates in 
the Academy library. 
The reading of papers was then resumed, the first two papers 
being those of Professor Case of Milwaukee on “Wave-rolled 
snowballs,” and of Professors Birge and Lenher on “Gases of 
Wisconsin lakes.” Professor Case made a brief report on 
the occurrence along the shore of Lake Michigan, after a re¬ 
cent storm, of great numbers of snowballs which had been 
rolled up by the waves. 
Professors Birge and Lenher reported on the occurrence of 
various gases that had been found in the waters of a number of 
Wisconsin lakes. This work is still in progress and will be 
more fully reported at a later time. The paper was discussed 
by Messrs. Harper, Kahlenberg and Slichter. 
As Professor Talbert wished to leave on a forenoon train, 
his two papers were next taken up. 
The remainder of the program was carried out as printed. 
Afternoon Session . 
The Academy was called to order by President Davis at 
2:30. 
The secretary read a letter from Mr. Charles E. Brown of 
Milwaukee, secretary of the Wisconsin Archaeological Society, 
