734 General Notes. [July, 
Following the principle of the Lewes and the Ray’ instruments, 
the ether spray is thrown on the under side of the object-plate 
instead of on the object itself. 
The apparatus consists of a short cylinder (Fig. 1 A), closed 
by the plate, P, on which the object is placed for freezing. A 
metallic tube (4) drawn to a fine point penetrates the base of the 
cylinder, and another (4) its side. The vertical tube (æ) is con- 
nected by rubber tubing with a small bellows, while the horizon- 
tal tube (4) is similarly connected with a glass tube which passes 
through the stopper of a bottle containing ether, reaching nearly 
to the bottom. When the bellows is set in motion the current of 
LULL 
2 
TTT 
i 
| 
nA 
| 
| 
| 
g 
| 2 
4 
| 
| 
| 
— 
| 
| 
ii 
-n 
| 
DDD 
c a 
Fic. 1.—Freezing cylinder seen in section. 
air throws the ether spray against the plate, P, and the rapid 
evaporation thus produced soon lowers the temperature suffi- 
excess of condensed ether. 
The cylinder is small enough to be received by the holder of 
the microtome. It is to be obtained from W. Emil Boecker, in 
Wetzlar, Germany, at sixteen and a half marks ($4.25). 
The Roy microtome, referred to above, is made by Schaure, 
Pathologische Institut, Liebig-Strasse, Leipzig. 
_ _ A new Freezinc Microrome.—Dr. F. O. Jacobs, of Newark, 
O., has devised the freezing microtome shown in Figs. 1 and 2. 
— lArch, f. mikr. Anat., XIX, pp. 137-143, Pl. v1, 1880, 
