ME. J. PEIESTLEY ON THE PHYSIOLOGICAL ACTION OF VANADIUM. 
537 
Exp. LV.— May 11, 1874. 
Rabbit. — Weight 2000 grms. 
Dose about 4 cub. centims. of the 5 per cent, solution (200 milli- 
grammes V 2 0 5 ), injected under the skin. 
The rabbit died 30 minutes 30 seconds after injection. Artificial respiration, which 
was commenced immediately on the cessation of natural breathing, again failed to pro- 
long or restore life (see Exp. XLIV.). 
In this experiment the symptoms were in general like those of the preceding one ; 
there was, however, no fluctuation in the intensity of the symptoms. 
Exp. LVI.— May 13, 1874. 
Rabbit. — Weight 1958 grms. 
Dose 5 cub. centims. of the 5 per cent, solution (250 milligrammes 
V 2 0 5 ), injected under the skin. 
Time. 
| Respirations 
in 10 seconds. 
Remarks. 
h. m. s. 
Tracheotomy. Insertion of glass cannula into trachea; exposure of 
carotid artery for simultaneous blood-pressure tracing. (See 
Exp. XLV.) 
1 41 0 
14-15 
Normals prior to injection. 
1 45 0 
Injection commenced. 
1 47 0 
Injection finished. 
1 47 20 
15 
1 49 30 
17-18 
1 53 0 
18 
1 55 0 
18 
1 58 30 
17 
2 0 30 
20 
Very shallow. 
2 3 0 
19 
Very shallow. Eye sensitive. 
2 9 0 
13-14 
Very shallow indeed. 
2 9 30 
11 
Slightly deeper. 
2 10 30 
9 
Slightly deeper. 
2 12 15 
12 
Deeper, hut not of normal depth. Eye slightly sensitive. 
2 12 45 
10 
2 13 15 
8 
Very deep — deeper than normal. Abdominal muscles convulsed. 
2 15 15 
12 
Shallower. 
2 16 0 
8-9 
2 16 15 
Struggles, which render respiration deep, irregular, and less frequent. 
2 18 30 
io 
Moderately deep. 
2 19 0 
8-9 
2 20 0 
9 
2 20 30 
9 
Moderately deep. 
2 21 0 
7 
2 22 0 
Death supervened suddenly, preceded by a few shallow gasps. 
This experiment agrees exactly with the preceding one. 
4 E 
MDCCCLXXVI 
