DR. MARSHALL HALL ON HYBERNATION. 
341 
ribbon, and of such dimensions as just to contain the animal. The bat was 
placed upon the ribbon, and inclosed by fixing the lid in its place. Being 
lethargic, it remained in undisturbed quiet. A thermometer, with a cylindri- 
cal bulb, was now passed through an orifice made in the box on a level with 
the ribbon, under the epigastrium of the animal, and left in this situation. 
It was only now necessary to make daily observations and comparisons be- 
tween this thermometer and another placed in the adjacent atmospheric air. 
The layer of silk, and the portion of air underneath, protected the animal from 
the immediate influence of the temperature of the table, on which the box was 
placed. 
The following Table gives the result of observations made during many days, 
in very varying temperatures. 
January 
Date. 
Temperature of 
the Atmosphere. 
Temperature 
of the Animal. 
6 
11 P.M. . . 
o 
. . 40 
• 
. 
M 
7 
8 P.M. . . 
. . 43 
• 
• 
43 
8 
• 
. . 41 
. 
• 
41* 
9 
11 P.M. . . 
• . 47 
. 
• 
46 
10 
10 A.M. . . 
. . 46 
• 
. 
46 
— 
12 midnight 
. . 47 
. 
. 
47 
11 
10 P.M. . . 
. . 45 
• 
. 
45 
12 
11 P.M. . . 
. . 45 
• 
o 
45 
13 
11 P.M. . . 
. . 37 
. 
• 
3 7\ 
14 
11 A.M. . . 
. . 37 
• 
. 
37 
— 
11 P.M. . . 
. . 40 
. 
. 
40 
15 
2 P.M. . . 
. . 37 
• 
. 
37 
— 
11 P.M. . . 
. . 35 
• 
. 
35 
16 
11 P.M. . . 
. . 37 
. 
. 
37 
17 
11 P.M. . 
. . 42 
• 
• 
42 
18 
11 A.M. . . 
. . 40 
• 
• 
40 
19 
10 P.M. . . 
. . 36 
• 
• 
36 
20 
11 P.M. . . 
. . 39 
. 
• 
39 
21 
11 P.M. . . 
. . 40 
. 
• 
40 
22 
11 P.M. . . 
. . 44 
. 
44 
2 Y 
MDCCCXXXII. 
