94 THOMPSON YATES AND JOHNSTON LABORATORIES REPORT 
V. 75 mgrms. CHC1, per Litre of Modified Ringer's Solution 
(CHCIj in -0075 per cent, dilution) 
No. of Heart 
Quantity of 
CHC1., solu- 
tion perfused 
Duration of 
flow 
A. beat reduced by 
V. beat reduced by 
Recovery 
Heart 2 : — 
Obs. 1 ... 
1,800 C.C. 
22 mins. 
40 sees. 
56 per cent.> 34 per 
cent. 64 per cent. 
80 per cent.^ 67 per 
cent. 
Full 
Heart 16: — 
Obs. 1 ... 
Obs. 2 ... 
Obs. 3 ... 
200 C.C. 
3 mins. 
9 sees. 
87 per cent. 
85 per cent. 
do. 
280 C.C. 
4. mins. 
1 8 sees. 
Practically stopped 
90 per cent. 
do. 
2*pO C.C. 
3 mins. 
9 sees. 
do. 
Practically stopped 
do. 
Heart 1 8 : — 
Obs. 1 ... 
166 C.C. 
3 mins. 
5 sees. 
88 per cent. 
Not recorded 
do. 
Heart 3 1 : — 
Obs. 1 ... 
Obs. 2 ... 
190 C.C. 
3 mins. 
85 per cent. ^ 66 per 
cent. 
97 per cent. ^ 
do. 
160 C.C. 
3 mins. 
3 sees. 
70 per cent. ^ 62 per 
cent. 
80 per cent. ^ 76 per 
cent. 
do. 
Average reduction, Heart 16, 3 obs. : A., 95-7 per cent. ; V., 91-7 per cent. 
,, ,, ,,31,2 obs. ; A., 7 7 ■ 5 per cent. ; V., 8 8 ■ 5 per cent. 
Mean reduction in three hearts : A., 79 per cent. ; V., 86 - 7 per cent. 
