300 BOTANICAL GAZETTE [OCTOBER 
Dr. J. P. Lorsy has concluded an elaborate study on the localization 
of alkaloids in cinchonas, the results of which, illustrated by twenty colored 
plates, are to appear in Dutch. In order to render the larger work more 
intelligible to foreigners, he publishes in German® a concise account of the 
more important results. These are as follows: 
The alkaloid is found in the contents of living parenchyma, even the 
nutritive parenchyma. It is not found, however, in cells containing calcium 
oxalate, nor in sieve tubes. In general (there are exceptions) the alkaloid in 
young members is dissolved in the cell sap. On the contrary, in older parts, 
é. g., in the secondary bast of stems, it exists as a solid amorphous substance 
in the interior of the cells, Very active parts, such as the cambium or the 
apical meristem, as a rule contain no alkaloid, but at a short distance from 
the centers of activity it is found in large amounts. 
Dr. Lotsy announces that these researches are preliminary to an inquiry 
into the physiological réle of the alkaloid in the plant, investigations in this 
direction having already been begun.—C. R. B 
In THE Botanisches Centralblatt (70: 184-189. 1897) Dr. R. Kolkwitz, has 
a useful summary of the literature on the movements of swarm spores, 
spermatozoids, and plasmodia, and their dependence upon external factors. 
Hecovers the period from 1885 to 1896, and gives a list of 75 papers.— 
AMANN recommends’ the following fluid, which he calls lactophenol, as 4 
medium for restoring dried mosses, alge, etc., to their natural size, and 
= sign aia them : crystallized phenol, c. p., 208"; lactic acid (sp. gt. !- 21), 
; glycerin (sp. gr. 1.25), 40%; distilled water, 20%. Herbarium mate- 
inl should first be warmed in dilute lactophenol and then treated with the 
ure. Five per cent. lactophenol in water, to which is added 0.2 per cent. 
each of copper chloride and copper acetate, is specially adapted to the preser- 
vation of algae.—C. R. B. 
CuHopart has exposed spores and developing mycelium of A/ucor Mucedo 
to a temperature of — 70° to — 110° C. for several days without killing them. 
The low temperature did not better the capacity of the spores for gereuee: 
tion, as Eriksson found a temperature of —12° C. did for spores of Uredinex.* 
—C. R. B. 
Dr. J. GrUss summarizes the results of a recent installment of his “ Studien 
iiber Reservecellulose’”° thus: 
© Bot. Centralblatt 71: 395. 1897. 
7 Zeitschr. f. wiss. Mikros. 13: —. 1897. 
* Bot. Centralblatt 70: 242. 1897. 
9 Bull. de l’Herbier Boissier 4: —. 1896. Cf. Bot. Cent. 70: 267. 1897. 
