ACTION OF POISONS. 141 



The probable explanation is, that the poisoned 

 blood of the one animal was rendered innocuous 

 by being diluted with the healthy blood of the 

 other.* 



In the second volume of the Philosophical 

 Transactions there is the history of an experi- 

 ment, in which several ounces of the blood of a 

 mangy dog were transfused into the jugular 

 vein of a healthy dog, without the latter being 

 affected by the disease. But, on the other hand, 

 I was informed by the late Professor Coleman, 

 of an analogous experiment which he had made, 

 but in a more complete manner, with a different 

 result. Professor Golem an's statement was, that 

 having abstracted so much blood from a sound 

 horse as to induce either complete syncope, or a 

 state approaching to it, he transfused into him 

 the blood of a glandered horse ; the result being 

 that the sound horse recovered from the syncope, 

 but some time afterwards was affected by the 

 glanders. 



* The same observations may be applied to some experi- 

 ments recorded by Dr. Addison and Mr. Morgan, in their 

 work on poisons. Indeed it is evident from the way in which 

 these experiments were conducted, that the transfusion must 

 have been very imperfect, and that if any blood actually 

 passed from one animal to the other it could have been only 

 a very small quantity. 



