DOSAGE OF THE MAMMALIAN HEART BY CHLOROFORM 93 
IV — Continued 
No. of Heart 
Quantity of 
CHCl 3 solution 
perfused 
Duration of 
flow 
A. beat reduced by 
V. beat reduced by 
Recovery 
Heart 35: — 
Obs. 1 ... 
> 
5 mins. 
1 0 sec. 
92 per cent. 
89 per cent. 
Full 
Obs. 2 ... 
2 mins. 
35 sees. 
Practically stopped 
8 8 " 5 per cent. 
do. 
Obs. 3 ... 
2 mins. 
10 sees. 
do. 
87 per cent. 
do. 
Obs. 4 ... 
45 sees. 
do. 
Practically stopped 
do. 
Obs. 5 ... 
1 min. 
35 sees. 
do. 
do. 
Very imperfect, with 
fibrillar contractions 
Heart 38: — 
Obs. 1 ... 
? 
42 sees. 
Practically stopped 
Practically stopped 
Full 
Obs. 2 ... 
1 min. 
45 sees. 
do. 
do. 
do. 
Obs. 3 ... 
1 min. 
50 sees. 
do. 
do. 
do. 
Obs. 4 ... 
1 min. 
38 sees. 
do. 
do. 
do. 
Obs. 5 ... 
43 sees. 
Nearly stopped 
Nearl}- stopped 
do. 
Average reduction of A. 96-9 ; of V. 97-6 per cent. 
