NOTES AND NEWS. 
Dr. Jos. Boeum, professor of physiological botany in the University 
of Vienna and also in the College of Agriculture, and an investigator 
of wide reputation, died December 2, 1893, at Vienna. 
De Lamar irre finds? that, for an equal surface, the leaves devel- 
oped in the sun show a greater intensity of respiration, assimilation 
and transpiration than those grown in shade, the well known struc- 
tural differences thus having a corresponding physiological signifi- 
cance 
: PRESERVING anatomical as well as herbarium material, Hein- 
richer avoids blackening of colorless saprophytes and parasites like 
Monotropa and Lathraea by plunging the living plant into boiling 
water for about a quarter of an hour and then transferring them to al- 
cohol or placing in a press, as desired.* 
MUELLER-TuHuRGavU has shown that various phenomena in cultivated 
Epes currants, apples, oranges, apricots and peaches, are directly re- 
ated to the number of seeds formed. The more seed formed the 
greater will be the weight of flesh, the slower the ripening, the greater 
. 
the amount of acid and the less the sugar, 
Mr. O. F. Cook sailed Oct. 25th for western Africa, to make further 
observations and collections of the plants of that region, especially of 
the cryptogamic forms. He will be gone a year or more. is former 
voyage resulted in securing a large amount of botanical material, and 
the present visit is expected to yield even greater results. 
MacmiLian & Co. of New York announce for early pe pant a 
work by Prof. G. F. Atkinson, entitled, “The study of the biology of 
ferns by the collodion method ; for advanced and collegiate students.” 
It is to be profusely illustrated, and is designed for laboratory instruc- 
tion and for reference on the development and structure of ferns. 
For MOUNTING preparations cleared with chloral hydrate which it is 
desired to retain in their transparent condition, Geoffroy suggests* a 
solution of 3-4 pure gelatin in 100” of 10 per cent. chloral hydrate. 
is can be used like glycerin, with the added convenience that it 
hardens at the edge of the cover, so that the cover can be cemented 
without tedious cleaning. 
QUANTITATIVE DETERMINATION of sugars by fermentation is de- 
scribed by A. Lasché in the Amer. Brewers Review 1: 2 
1893. The method is given by which the percentage of dextrose, sac- 
charose, maltose and isomaltose in glucose can be found by use of 
Saccharomyces apiculatus, S. Joergensenii, and S. cerevisie. Two 
types of the latter are required, the Frohberg type and the Saar type. 
ie 
“Revue gén. de Bot. 4: 481, 529.1 892. 
*Zeits. f. Wiss. Mikros. 9: 321-3. 1893. 
*Jour. de Botanique 7: 55. 1893. 
