DOSAGE OF THE MAMMALIAN HEART BY CHLOROFORM 
99 
IX. 20 mgrms. CHC1 ? per Litre of Modified Ringer's Solution 
(CHC/ f in - oo2 per cent, dilution) 
No. of Heart 
Quantity of 
CHC1 3 solution 
perfused 
Duration of 
flow 
A. (left) beat reduced by 
V. beat reduced by 
Recovery 
Heart 41 : — 
Obs. 1 ... 
76 C.C. 
2 mins. 
48 per cent. 
28 per cent. 
Full 
Obs. 2 ... 
78 C.C. 
I min. 
58 sees. 
34 per cent. 
1 5 per cent. 
do. 
Obs. 3 ... 
140 C.C. 
3 mins. 
34 per cent. 
50 per cent. 
do. 
Obs. 4 ... 
260 C.C. 
5 mins. 
40 per cent. 
38 per cent. 
do. 
Obs. 5 ... 
68 c.c. 
1 min. 
30 sees. 
f 
28 per cent. 
do. 
A. right 
Obs. 6 ... 
124 C.C. 
1 min. 
5 5 sees. 
3 5 per cent. 
34 per cent. 
do. 
Obs. 7 ... 
240 C.C. 
3 mins 
25 sees. 
27 per cent. 
35 per cent. 
do. 
Average reduction in A., 6 obs. = 36-33 per cent. ; V., 7 obs. = 32-57 per cent. 
X. 19 mgrms. CHC1 ? per Litre of Modified Ringer's Solution 
(CHC/ J in -0019 per cent, dilution) 
No. of Heart 
Quan tity of 
CHC1 3 solution 
perfused 
Duration of 
flow 
A. beat reduced by 
V. beat reduced by 
Recovery 
Heart 14 : — 
Dog's, Obs. 1 
Obs. 3 
1,700 C.C. 
9 mins. 
35 sees. 
64 per cent. 
Not recorded 
Good 
1,800 C.C. 
9 mins. 
35 sees. 
75 per cent. 
do. 
Average reduction = 69*5 per cent. 
