220 " BOTANICAL GAZETTE. | August, | 
AN INTERNATIONAL American Congress will be held in Berlin, in 
Oc t, + Be ta | er oo l,g g I » Os 41 g I , ie linguistic 
and similar subjects relating to the American continent. Of the thirty- 
seven topics arranged in the preliminary programme, only one is botan- : 
ical—the economic plants of the ancient Peruvians, introduced by Dr. 
Wittmack, of Berlin. 
¢ 
Mass., deserves success. It opened its first season July 10, under the di- 
rectorship of Dr. C. O. Whitman, and will close September 22. It is 
open for both investigators and students. The situation is all that could 
be desired, both as a delightful place for the summer and as affording 
abundant and varied material. It will be remembered that Dr. Farlow 
had his summer class at this place on account of its rich display of alge. 
Dr. H. R 
bers constructed for the purpose, the amount of heat given off by plants 
errors was prevented are described in detail. The loss of heat from 
to be about 0.924. 
same time in all the experiments.— Jour. y. Mic. 
THE CENTENARY of the Linnean Society of London, May br alo 
society during the past year, mentioning prominently DeBary and Gray. 
n accordance with the spirit of the occasion, he spoke of 
Linnzus, the transference of his collections to England, and the develop 
Soci ° ; 
logium upon 
them new to science in ni 
. 7 » 1 nine years, was a feat unexampled in 
of botanical science. Professor Flower gave the eulogy on Cha 
win, and Mr. Thiselton Dyer upon rg 
medal was presented to Professor Owen and Sir J oseph Hooker. 
*Pringheim’s Jahrb. f. Wiss. Bot. xviii (1887), pp. 263-345. 
