duction along these two systems of connection is much retarded. 
The widening and enlargement of the systoles after the longer pauses 
is here, as likewise in the other figures, very conspicuous. Fig. 4 
bee) 
is reproduced 150 systoles after the former. 
Fig. 4. 
Continuation of Fig. 5, 150 systoles afterwards. 
In the mean time the groups have become smaller and they now 
form here trigeminus-groups. In all 4 figures the bigeminus-groups 
have been reproduced 20 minutes later than the first row. 
The second systole of each bigeminus- and the third of each 
(rigeminus-group is always least high and wide. In each group there 
is consequently a diminution of the dimension of the systoles. From 
my former communication it is known, that in bigeminus-groups 
the point and the basis can pulsate alternately. In this case every 
systole was not a systole of the whole ventricle musculature, but 
for each of the two systoles every time another part of the ventricle- 
muscle was in contraction. Consequently there can be no doubt but 
partial asystole is possible. And so I saw here with every bigeminus- 
group during the first systole the whole ventricle contract, and during 
the second the point of the ventricle continued inactive. We must 
explain this by the fact, that the irritability of the heart-point 
diminishes here during the groups, so that after every first systole 
the conducted irritation cannot make it contract. This is likewise 
true for the trigeminus-groups. 
In order to make a more accurate investigation into the cause 
of the falling out of the first systole (vide Fig. 1) I have measured 
