872 THE AMERICAN NATURALIST. 
A doctor’s thesis by S. L. Schouten, on the methods of securing 
pure cultures of micro-organisms from a single cell isolated under the 
microscope, has been issued from the University of Utrecht. 
The present knowledge of the causation of certain plant diseases 
by bacteria is well brought out in a series of controversial articles 
by Professor Fischer and Dr. E. F. Smith, in the Centralblatt für 
Bakteriologie und Parasitenkunde, extending over the last two or 
three years, separates of which have recently been distributed by 
Dr. Smith. 
Ule shows, in Heft 2 of the current volume of Engler's Botanische 
Jahrbücher, that a number of Amazonian Epiphytes seem to owe their 
distribution in part to certain ants which take to their nests in trees 
seeds of the other plants, some of which vegetate there. 
` The initial number of what promises to be an interesting seriés of 
articles on the pollination of Chilian flowers is published by Dr. 
Jokow in Heft 3-4, Bd. IV, of the Verhandlungen des deutschen 
wissenschaftlichen Vereins zu Santiago de Chile. ` 
Prometheus, of June 12, contains the first of a series. of articles by 
.Sajó on plums and other fruits of American origin. 
Mr. Pinchot has issued as. Bulletin No, 30 of the Division of fun e 
try of the United States Department of Agriculture a very practical 
forest-working plan for. a portion of the New York forest preserve, 
prepared by Messrs. Hosmer, Bruce, and : Newell 
The Imperial Botanic Garden of St. Petersburg. feels the angi 
experienced by most active scientific establishments of a medium of 
publication under its own control as to time.and other important 
conditions, and the. director. of.the garden, Professor A. Fischer de 
Waldheim, announces the early appearance of the. first. number of a 
Bulletin which the. Garden i is to issue. 
Phe. Plant World for: June: contain rtis intanet ehan arti- 
cles, among them one on the Cuban uses ofi Oreodoxa, one on Ber- 
muda, and some suggestions . as to. the points. to be observed in 
collecting . specimens. of Cratzegus. mcn 
A portrait and appreciative: dintie sited i Forbes Meehan 
appear in the — oe of inn ise kd de 
i odor Geyer ew 4 
