1913] 
Proceedings 
73 
the Wisconsin Mycological Society; and the Wisconsin Natural History 
Society. The meeting is to be held in the Public Museum Building, on 
March 20 and 21. 
The secretary, having received a communication from Dr. W. S. Mar- 
shall relative to the securing of several volumes of the Bulletin, brought 
to the attention of the Society the question of the sale of non-current 
copies to members. Mr. Muttkowski, the editor of the Bulletin, said 
that a precedent had been established to allow a discount to members of 
25 per cent on the sale price of each volume. It was thereupon voted that 
Dr. Marshall be allowed such a discount; and that the matter of giving this 
discount regularly, be acted upon at the next meeting. 
The special assigned topic for the meeting was: “Migration, Natural 
and Artificial.” All persons present joined in the discussion, which touched 
on a number of groups of both plants and animals. 
Dr. Graenicher exhibited a specimen of great interest, especially to those 
living in the more northern states — that of a flowering spike of the banana 
plant. He remarked on the methods of dissemination of this plant, and 
on the structure of the spike, whose large and strikingly colored bracts 
might, at first sight, be called petals. 
The meeting then adjourned. 
Milwaukee, Wis., April 10, 1913. 
Meeting of the combined sections. 
President Barth in the chair. Six persons present. Minutes of last sec- 
tion meeting read and approved. The chair announced that the regular 
meeting for March had been omitted, on account of the joint meeting of 
the several societies, which was held under the auspices of the Wisconsin 
Academy of Sciences, Arts and Letters. 
The special topic for the evening was: “Tropisms in Plants and Ani- 
mals.” Messrs. Barth, Dernehl, Smith and Heddle participated in the 
discussion. 
Dr. Dernehl recorded an interesting observation made by him at Madi- 
son, Wis. He found that ants, unable to crawl up the densely hairy stem 
of the common pasque-flower in their search for nectar, would climb up 
near-by grass blades and drop off into the flower cup as the wind swayed 
the blades towards the plant. 
The meeting then adjourned. 
