264 DICTIONARY OF THE VETERINARY ART. 



alarming symptoms, and appeared to have a poisonous 

 effect." 



Nostrils. The^ nostrils are sometimes diseased, as in 

 glanders. 



Nutrition. (See part first.) 



o 



Oats. According to Sir H. Davy's analysis, oats contain 

 742 parts of nutritive matter out of 1000, which is composed 

 of 641 mucilage, or starch, 15 saccharine matter, and 87 

 gluten, or albumen. New oats are difficult of digestion. 



Oblique Muscles. The muscles of the abdomen, or belly, 

 are thus named. There are four of them : two external and 

 two internal. Some of the muscles of the eye are also named 

 oblique muscles. 



Occiput. The back part of the head. 



(Edema. A watery or dropsical swelling. 



(Esophagus. The tube passing from the mouth to the 

 stomach. 



Ointments. Unctuous substances of the consistence of 

 butter ; when made considerably thinner by the addition of 

 oil, they are termed liniments ; but when their solidity is in- 

 creased by wax, rosin, &c, they are termed plasters. 



Olecranon. The head of the bone named ulnar, (see cut,) 

 in the horse ; it affords a powerful lever for the triceps exten- 

 sor cubiti muscle to act upon, in straightening the fore arm 

 upon the humerus. (See Skeleton.) 



Olfactory Nerves are spread over all the interior of the 

 nostril, and constitute the sense of smell. 



Omentum. The omentum, or caul, is a double membrane, 

 containing within its folds a considerable quantity of fat, in 

 the human body and many animals. But in the horse this 

 is never seen ; nor does the omentum contain much fat ; what 

 there is lies in the region of the stomach. 



Opacity. A want of transparency in those parts of the 

 eye named pupil, or cornea. 



