188 MICROSCOPY. 
PRESERVATION OF FRESH-WATER PoLyzoa.— Mr. Stewart ex 
plained to the South London Microscopical and Natural History 
Club that he had succeeded in killing polyzoa with the tentacles 
expanded by adding a few drops of the best French brandy to 
the water they were living in. They were overcome by the liquor, 
without drawing in their plumes. 
CRYSTALLIZATION oF Metats py Execrricrry.— This has beet | 
studied under the Microscope by Philip Braham, Esq. His app — 
ratus is described in the ‘“‘ Monthly Microscopical Journal,” for 
Dec. 1871. 
Cexsucation 1x Rurzorops.— J. G. Tatem, Esq. has observed | 
what seems to be an instance of this hitherto unnoticed, though 
not unsuspected, process in the case of a common Amoeba, 
PHOTOGRAPHING BY BLack-crounp ILLUMINATION. —D'. hk 
ward has obtained good high-power photographs (x 1000) of 0 
jects saree sae by Mr. Wenham’s truncated lens. 
Cieanine Diatroms.— Dr. Maddox cleans and bleaa u 
toms by immersion in a solution of chlorate of potash and af — 
drochloric acid. Se 
Microscorreat Structure or THE Wax or BLOOM OF re : 
— An interesting study of this familiar substance wee : 
leaves and fruits, by Prof. De Bary, is given in the “ Botanica a 
tung,” with some thirty beautiful illustrations. The wax i 
not appear to be a simple coating over the surface, as thong 
might have been laid on liquid with a brush, forming hairs 
ous layer. Itis seen to be rather a dense forest of min 
of wax; each one sitting with one end upon the epidermis eo | 
other either rising up straight or rolled and curled 4 "o dense 
neighbors. This matting of waxen hairs often becomes 50 
that when examined from the surface it presents to i nit 
Scope the appearance of a continuous layer, while a carefully 
section of the leaf, or skin of the fruit, shows its true yae 
— question from what part of the epidermis Or sube 
swered. He says that in the cell-contents there can i 
ered the slightest trace of wax, and the statement tba 
rophyll is partly made of wax is totally erroneous. 
