PART I.] Injections of Organic Solutions, not Choleraic, into Veins. 1 1 1 



Experiment LIV. — Half an ounce of the watery solution of ordinary foecal matter 

 which had been used in Exp. L and which now emitted an extremely foetid odour, 

 was injected into the femoral vein of a small young dog, but within a few minutes 

 after the operation, although he appeared to be getting out of the influence of the 

 chloroform, his breathing altered and was carried on by gasps. An attempt was 

 made to draw off blood from the opposite femoral vein ; but the circulation had 

 stopped. 



The viscera were at once exposed, but nothing distinctly abnormal observed. The 

 venous system was intensely gorged with blood and both sides of the heart were 

 distended. In the blood abstracted from the cavities of the right side, monads and 

 bacteria were detected, but in blood removed from the axillary vein no positive 

 evidence could be obtained of the presence of bacteria ; the injected fluid would of 

 course have had to pass through the capillaries of the lungs and of the systemic 

 circulation before reaching the axillary vein. 



Experiment LV. — A small pariah dog into whose femoral veins two different 

 specimens of decomposing choleraic dejecta had already been injected without producing 

 any marked result, was again placed under chloroform and half an ounce of the 

 decomposing solution of ordinary foecal matter (exactly as used in the last experi- 

 ment (LTV), both experiments being performed on the same day) was injected into 

 the median basilic vein. 



After the operation, it is noted, " the dog appears as if nothing had happened." 

 He was kept under observation for a week, when, in order to ascertain what changes 

 all these putrefying matters might have produced, he was again placed under chloroform, 

 and allowed to breath it till respiration ceased. The wounds over two of the three 

 veins which had been tied were completely healed. There was no peritonitis, the 

 intestines were pale and perfectly healthy, so were all the viscera except the lungs 

 and spleen. In the former, on both sides, large patches of hepatized tissue were found 

 evidently due to pneumonia, and, enclosed by this altered tissue, at one spot was a 

 small cavity filled with a dark thickish fluid. In the spleen there was, near the 

 surface of one end, a small extravasated pouch about the size of a hazel-nut. 



The blood was carefully examined for monads and bacteria, but none could be 

 found. 



Experiment LVI. — Half an ounce of a decomposing solution of ordinary alvine 

 discharge, 72 hours old, the same as used in Exp. XLVII, etc., was injected into 

 the right femoral vein of a dog, previously brought under the influence of chloroform. 

 Not a drop of blood was lost during the operation. 



There were not the slightest manifestations of illness during the three days the 

 animal was kept under observation, and when the viscera were examined after it had 

 been killed under chloroform, they were all found to be perfectly healthy. 



