MICROSCOPY. 
A New Growi1ne-ce_t.— Having lately had occasion to exam- 
ine some minute forms of life, and finding that, from some cause 
or other, most of the growing cells failed to work well continu- 
ously, I made a growing-cell similar to the following sketch, which 
I trust some readers will find useful. 
Cut two pieces of moderately thick crown glass, one 3 inches 
14 inches, the other 1}? inches by 14 inches, cement these 
together with Canada balsam; when dry, fix with the same cement 
two slips of glass of the same thickness to the other end of the 
slip, so as to form the 
sides of the reservoir (D 
D) ; also fix with gold-size 
slips of thin glass, so as to 
V7, form the sides of the grow- 
7, ing-cell (F F F F); when 
| quite dry, cement a piece 
of thin glass 2} inches by 
Fig. 174. 
small quantity of gold-size is used, or it will run into the growing- 
cell. When used, fill the reservoir with fresh water until it runs 
into growing-ċell A, and both are at the same level. The object 
(the growth of which it is desired to observe) may then be placed 
in the cell. If made of these dimensions, the water in the reser- 
voir B will continue to supply fresh water to the growing-cell for 
at least three days without being refilled ; of course, if the reser- 
voir is made larger, it will last longer than this. 
References to illustration: A, growing-cell; B, reservoir fresh 
water; C, glass slip 3 inches by 14 inches; D, side of reservoir ; 
E, thin glass 2} inches by 1} inches; F, sides of growing-cell ; 
G, growing object.— Jno. H. Martın, Micro. Assay Laboratory, 
Maidstone, England. 
ES se Sone) : 
eh oe eae ee 
REVIVAL or ANIMALCULES AFTER DesiccaTron.— Mr. Henry 
Davis discusses this old and curious question in a recent contribu- 
tion to the Royal Microscopical Society. He finds that Pritchard 
_ and Carpenter and nearly all modern scientific writers have aban- 
) 
(698 
E 
peen 
