246 MR. H. F. BAXTER’S EXPERIMENTAL INQUIRY AS TO THE EXISTENCE 
on the outside of the gut over E A where the blood had not been, whereas with 
blood flowing from the vein, they may be separated to the extent of an inch or more, 
the effect occurring. Stomach and liver ; the p of E A inserted into the former to 
the extent of an inch, E B lightly pressed on the surface of the latter ; stomach 
positive 8° ; an attempt was made to insert the of E B into a vein coming from 
the stomach, but failed from the difficulty in obtaining a vein of sufficient size ; when 
it was inserted into the portal vein, no effect. E C inserted into the caput coli ; 
stomach slightly positive. 
Experiment 4. — Cat. Prussic acid dropped on the nose. Mucous membrane of 
the ilium, and a vein from the same part ; the of E A in contact with the former 
to the extent of an inch and a half, the jo of E B with the latter ; blood positive 5°, 
and made to increase : a vein coming from a different part was punctured, no effect ; 
with the former vein the effect ensued, but not when it had become empty. 
Mucous membrane of the stomach and blood from the same organ ; the^ of E A 
was in contact with the great curvature of the stomach to the extent of an inch, a 
vein corresponding to the lesser curvature was punctured with thep of EB ; no effect : 
the portal vein was punctured at its commencement ; as the blood flowed out a slight 
effect occurred, blood positive : E B was lightly pressed on the surface of the liver ; 
the latter slightly positive. 
Mucous membrane of the upper part of the colon, and vein from the same part ; 
jo of E A in contact with the former to the extent of an inch and a half, the of E B 
with the latter ; blood positive : E B pressed on the surface of the liver ; the latter 
positive. The liver and intestines covered with blood. 
The of E A inserted into the stomach, E C into the colon ; no effect. 
Stomach and small intestines empty. 
Experiment 5. — Cat. Killed as the last. In opening the abdomen the liver was 
wounded. The mucous membrane of the upper part of the small intestine, where 
active digestion was going on, was in contact, to the extent of an inch, with the jo of 
E A ; an artery going to the same part was punctured with the of E B ; no effect ; 
when the vein was wounded, a decided result ; blood positive. The inside and outside 
of the gut were formed into a circuit ; no effect. 
The mucous membrane of the stomach, in contact with the p of E A, to the extent 
of an inch, E B with blood flowing from the vena porta; blood slightly positive: 
placed on the liver ; the same result, but not when the point was used. The liver 
covered with blood from the wound. 
The pelvis and renal vein of the same kidney were formed into a circuit, with the 
p of E C and of EB ; vibrations occurred, but impossible to obtain any decided effect 
by making and breaking contact. 
Between the mucous membrane of the colon and vein ; blood positive. 
Stomach half-full of food. 
The following experiment was to ascertain how far the different solid and fluid 
substances in contact with the electrodes might interfere with the result. 
