ACTION OF THE EXCISED MAMMALIAN HEART. 
249 
Table H. —Rate of Wave in Spontaneous Beats. Mammal. 
Animal. 
Time p.m. 
Rate of wave 
per secoud. 
Lever rising 
first. 
Remarks. 
minutes. 
mms. 
Rabbit . 
4 
450 
A 
A > B. 
4-13 
cc 
= 
A slightly precedes B, where A > B. 
1-5 
1395 
A 
A > B. 
Cat .... 
3 
1000 
A 
A = B. Tracing 13. 
3 
2400 
A 
A > B. 
Rabbit . 
3 
1000 
A 
A > B. 
Cat .... 
2, 4, 5, and 6 
cc 
= 
A = B. 
Kitten . 
2, 3, 4, 5, and 6 
cc 
= 
A = B. 
Cat .... 
5 
1200 
A 
A > B. 
# # 
oc 
z=r 
A = B. 
2 
400 
A 
A > B. 
4 
oc 
A = B. 
4-5 
CC 
= 
A > B. 
Dog .... 
1 
1200 
A 
A < B. 
Cat .... 
2 
2400 
A 
A > B. Tracing 12. 
9 
444 
A 
A < B. 
4 
300 
A 
A < B. 
4 
600 
A 
A < B. 
Dog .... 
4 
2400 
A 
Sheep . . 
4 
8000 
A 
A > B. Duration of contraction H2 sec. 
Dog .... 
3-4 
2320 
A 
A > B. Duration of contraction - 36 sec. 
Guinea-pig 
2-5 
900 
A 
A > B. 
Cat .... 
4-5 
400 
B 
A > B. 
Kitten . 
5 
300 
B 
A = B. 
Cat .... 
5 
1875 
A 
A > B. 
Rate of Wave in Spontaneous Beats. Frog. 
76 
B 
35 
B 
40 
B 
20 
B 
Tracing 15. 
12 
B 
90 
B 
• 
100 
B 
100 
B 
100 
B 
79 
B 
133 
B 
Note. 
A > B'l 
A = B > 
A< Bj 
Signify that the curve of the apex lever was higher than, equal to, or less than that 
of the base lever. 
2 Iv 
MDCCCLXXXVII.— B. 
