422 
Remarks were made by Professor Britton, Mr. Alexander and Mr. 
Moseley. 
Mr. Albert F. Woods presented a note on a method of pre- 
serving the green color of plant tissues especially to show contrasts 
between green tissues and those of other colors. The method is 
briefly to soak the material in a dilute glycerine solution containing 
a little copper sulphate for several days or weeks, then, after 
washing out the extra copper, mount the material in glycerine 
gelatine hardened with formalin. 
Tsurspay, AUGUST 12TH. 
The President appointed a committee to nominate officers for 
the ensuing meeting, and on the report of the committee the fol- 
ing were unanimously elected: President, Professor Conway 
MacMillan; Vice-President, Professor C. B. Waldron ; Secretary, 
Mr, A. B. Seymour. 
Professor A. D. Selby noted winter injury of plum and peach 
trees in Ohio during the past winter. Plum trees that had been 
defoliated in summer by Cylindrosporium Padi were severely dam- 
aged by freezing ; more than 75 per cent. of three-year-old trees 
of certain varieties were killed to the snow line; eight-year-old trees 
had the bark separated from the trunk, chiefly on the south and 
west sides. 
Professor Selby also remarked that leaves of Av/anthus dropped 
prematurely in June during and following the severe hot weather. 
Angular areas became discolored and subsequently dropped out. 
No parasite was found. It appeared referable to secondary effects 
of insect puncture. 
Professor V. M. Spaulding spoke of the formation of a botan- 
ical garden at the University of Michigan at Ann Arbor, on the 
campus, where some 300 herbaceous species are now in cultiva- 
tion. 
Dr. Rodney H. True discussed the causes of the nodding of 
moss capsules. 
Preliminary experiments directed toward determining the 
causes and directive influences controlling the nodding of capsules 
showed that in Minum cuspidatum the weight of the capsule has 
no noticeable influence. The curvature seems to be a response to : 
