CATTLE. 



or, if the eyes are closed, applies an evaporating lotion of cold water, 

 with a little spirit, and possibly gives gentle physic ; and he soon 

 has the satisfaction to see ihe inflammation disappearing, and the 

 ulcers gradually healing, which he hastens by a veiy weak zinc w^ash. 



The ox is subject to Cataract, but it is not often seen, because 

 periodical ophthalmia is not frequent in him ; as soon as its existence 

 is ascertained, the animal should be prepared for slaughter. 



GuTTA SERENA, or palsy of the optic nerve — blindness in one or 

 both eyes, yet the perfect transparency of the eye preserved — is a 

 rare disease among cattle ; it is no sooner recognized than the beast 

 is destroyed. 



Cancer of the eye, or a perfect change of the mechanism of the 

 eye into a fleshy, half-decomposed substance, that ulcerates and wastes 

 away, or from which fungous growths spring that can never be 

 checked, is a disease of occasional occurrence. The remedy would 

 be extirpation of the eye, if it were deemed worth while to attempt it. 



There is a very curious disease of the eye. The common symp- 

 toms of ophthalmia appear, as injection of the conjunctiva, dimness of 

 the cornea, weeping, and swelling of the lids ; the inflammation 

 increases ; and, on close examination, a small white W'Orm, about the 

 size of a hair, and an inch in length, is found in the aqueous humor, 

 that fluid which is immediately behind the cornea. It is evident that 

 the only way to get rid of, or destroy this w^orm, is to puncture the 

 cornea, and let it out ; and this has been resorted to. In some cases, 

 however, not many days pass before another worm makes its appear- 

 ance, and the operation is to be performed a second time, and the ox 

 eventually loses that eye. Three or four days before the appearance 

 of the worms, one or two minute bodies, of a reddish-white color, are 

 seen at the bottom of the anterior chamber of the eye. The disease 

 appears about June, and is not seen after December. 



FRACTURE OF THE SKULL. 



One class of the diseases of the head to which cattle are exposed 

 will fall under the title of compression of, or pressure upon, the brain. 

 Although it is a curious fact, that portions of the external or cineritious 

 part of the brain may be cut away without the animal being conscious 

 of it, yet the slightest pressure cannot be made upon -the brain with- 

 out impairment of consciousness, or loss of the power of voluntary 

 motion. 



'I'he very construction of the skull of the ox, w^hich gives a degree 

 of security from ordinary danger, deprives us of all means of relief, 

 in case of compression of the brain from fracture, and therefore the 

 animal should always be consigned to slaughter. 



HYDATIDS AND TUMORS IN THE BRAIN. 



Cattle are subject to a disease in which the animal goes round and 



