732 General Notes. | September, 
the Cincinnati Society of Natural History, Oct., 1879. Cincinnati, 1881. From 
the author. 
The Foundation of American Dermatology; being the President’s address at 
fourth annual meeting of the American Dermatological Association held at Newport, 
gust 31, 1881. By Louis A. Duhring, M.D. 8vo, pp.30. Ext. from the 
Transactions of the Association. Philadelphia, 1881. From the author. 
:0:——— 
GENERAL NOTES. ” 
BOTANY .' 
Borany in Minnesora.—The University of Minnesota opened, 
during July, a Summer School of Science, in which instruction 
by lectures and laboratory practice was furnished in chemistry 
(Professor Dodge), geology (Professor Hall), and botany (Profes- 
sor Bessey). About forty teachers enrolled themselves for the 
courses. The botanical laboratory, supplied with twenty-five 
microscopes, was open from 9 A.M. to 5 P.M., excepting the lecture 
our, from 11 to 12 o’clock. The Mississippi river, above an 
below the falls of St. Anthony, and the long cafion, with its 
high cliffs, extending from the falls to Fort Snelling, together 
with the innumerable lakes in the vicinity of Minneapolis, Sup 
plied an abundance of material for study. The cooler climate of 
Minnesota made work possible even in the heated term of this 
u. The Structure and Physiology of Cryptogams—(1) 1 he Sexless 
Plants (Protophyta) Protococcus, Nostoc, Oscillatoria, Rivularia, 
yeast plant, Bacteria; (2) The Unisexual Plants (Zygospore®), 
Hydrodictyon, Conferva, Desmids, Diatoms, Spirogyra, Mucor ; 
(3) The Egg-spore Plants (Odsporeze), CEdogonium, Vaucheria, 
Peronospore, Cystopus, Fucus ; (4) The Red Seaweeds and their 
allies (Carposporez), Podosphera, Eurotium, Parmelia, Puccinia, 
Agaricus; (5) The Mosses and their allies (Bryophyta), Marchan- 
tia, Mnium; (6) The Ferns and their allies (Pteridophyta), ye 
prothallia, and fruiting, Pteris, Polypodium, Selaginella. 1. ‘ 
Structure and Physiology of Phanerogams.—The structure ‘a 
ymnosperms ; the sexual reproduction of Monocotyledons ; ¢ 
sexual reproduction of Dicotyledons. we. 
Tue Stupy or Arc& In THE Unirep Srates.—About pie 
years ago Dr. H.C. Wood, of Philadelphia, published h1s ‘ce 
well known “ Contribution to the history of the fresh water A e 
of North America,” which made it possible for the earn 
begin the systematic study of our fresh water species. Wit ee 
1 Edited by Pror. C. E. Bessey, Ames, Iowa. 
