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down, disintegrated, and carried by the splenic vein into the portal 

 vein, thence to the liver, and help to form bile. (See Leciure VIII., 

 Circulatkn.J The spleen is supplied with blood by the splenic artery — 

 a branch of the Cceliac Axis, which is a large artery, that arises from 

 the posterior or abdominal aorta, just after it passes through the 

 diaphragm. This artery divides into three branches ; — ist, the gastrtc 

 artery, supplying the stomach ; 2nd, the hepatic artery, supplying the 

 liver ; and 3rd, the splenic artery, which supplies the spleen with 

 nutrient blood. Although the spleen can be done without, it is a very 

 dangerous organ when diseased. Sometimes, in the horse, it reaches 

 an enormous size, without, however, showing any appreciable 

 symptoms during life. 



324. Lymphadenoma. — This is a peculiar disease of the spleen in 

 the horse — said by some to be -of a tubercular character. The 

 symptoms are very remarkable— the animal feeds well, but gradually 

 loses flesh ; has a dingy staring coat, and a staggering, swinging gait. 

 The visible mucous membranes, such as eyelids, &c., are as pale as 

 white paper ; the pulse is soft, and rather frequent ; the bowels, as a 

 rule, are quite normal. The animal lingers on for some considerable 

 time, having to be supported on slings to keep it on its feet. These 

 cases are invariably fatal, the post-mortem showing the presence of 

 pearly-white tumours of lymphoid tissue, and of various sizes, made up in 

 concentric layers, that are studded through the spleen, while at times the 

 lymphatic glands are also implicated. Treatment is of little avail, 

 but one drachm each of iodine and sulphate of iron made into a ball 

 and given once a day till eight doses are given can be tried, and 

 repeated if necessary. 



325. Splenic Apoplexy, or Anthrax. — It has been shown 

 by microscopical examination of the blood, and verified by direct 

 inoculation of the same into healthy subjects, that anthrax is due 

 to the presence of micro-organisms — the Bacilli Anthracis, — and nearly 

 all the domestic animals are more or less subject to its influence, as is 

 also the human being. While subscribing to the above, there 

 is still something very remarkable to be noticed about the so called 



