CONNECTED WITH THE BEAT OF THE MAMMALIAN HEART. 
191 
Normal. 
(Cons. fig. 6.) 
Reversed. 
(Cons. fig. 8.) 
1 
Mouth to H2SO4 
Left hand to Hg 
(ON 
_ 
2 
?) 
Right hand 
to Hg 
— 
(0 N 
3 
>> ?? 
Left foot 
,, 
(ON 
(ON 
4 
11 
Right foot 
11 
(ON 
(ON 
5 
Left hand ,, 
Right hand 
11 
in) S 
(0 N 
6 
11 11 
Left foot 
11 
(0 N 
7 
If 11 
Right foot 
11 
— 
(0 N 
8 
Right hand ,, 
Left foot 
(0 N 
— 
9 
11 1^ 
Right foot 
(0 N 
— 
10 
Left foot ,, 
11 
11 
0 
0 
Fio;s. 6, 7, 8. 
The capital letter N, or S, gives the direction of the second phase ; that of the first phase, which by 
inspection could not be determined in each case, is represented by the small letters n, s, in parentheses. 
The direction of the second phase is in every case such as to indicate B negative to A. 
On reversal of the connections, as given above, the electrometer movement was in every case opposite 
to that indicated in the Table. 
In one instance only (No. 5) the directions in the normal and reversed subjects are opposite; a 
reference to the figures 6 and 8 shows that it is the only instance in which two points, a and i, are 
simply transposed. 
