HOKSli MANAGEM'iN'I, ETC. 401 



ihsion signifies the transfer of blood from one living mi laal uO 

 -mother, by means of a hollow tube inserted into the jugular vei ih 

 r>f each horse. Hii method was as follows : 



" I comnicnced a series of experiments, so as to di ico /er tl;« 

 simplest, safest, and most effectual method of convey'.ng blodd 

 6t3m one animal to another. I first tried the transfusion s fringe^ 

 which has been used by medical practitioners for this purpose; 

 but, whetlur from want of skill in its use, or from somo difect in 

 the instrument, (which had been recommended to me as on( of the 

 beet,) or from some other cause, I can not tell, but certain it is I 

 was in no case so successful with it as I was with a more simple 

 apparatus. I fancied that the blood lost much of its vitality by 

 being exposed to atmospheric action, and also by its being forced 

 and compressed within the cylinder of the instrument. These 

 »ranressi'^ns as to the cause of failure induced me to undertake 

 several experiments, with a view to the construction of an instru- 

 ment which would fulfill the requisite indications; namely, to allo\» 

 the blood to pass freely from the vein of the heakhy into tliat of 

 the diseased subject, without coming in contact with the atmos- 

 phere, and without alteration of its temperature. I at length 

 adopted an exceedingly simple apparatus, which may be described 

 in a few words. It consists of an India-rubber tube, some two 

 and a half feet long, and three-eighths of an inch in diameter; 

 that is, about the caliber of the vein in the adult horse. To either 

 end of this is fitted a silver tube, curved somewhat like a syphon, 

 %o that lue end, which is slightly rounded at the point, might be 

 esasily passed into the vein, both tubes being exactly alike. A nar- 

 row zinc or tin trough is required, to contain hot water, in which 

 two-thirds of the tube should be immersed during the time that 

 the blood is flowing. This completes the apparatus ; and, being 

 prepared, and the horses ready, held by assistant's, the jugular 

 I'ein of the haalthy horse from which the supply of is to i>e taktD 

 may be opened, and into it one of the silver tubes carefully passed, 

 point upward, so a-; to receive the current of blood as it flows back 

 from the head — the operator hoMing the other end, and, laving 

 previously opened the corresponding vein in the patient, be shoula 

 wait till the current is passing freely dawn the tube fn m the 

 healthy horse, and then bring it in contact with that whiih is now 

 flowing slowly from the patient. He should pass the < ad of the 

 hibe carefully int") the vein, point downward, by which iie ms tJi« 



