122 CANCER OF NERVES AND BRAIN OF A COW. 
mouth, mingled with the partially masticated food. Attenuation of the 
paralysed muscles quickly followed, and much general emaciation of the 
frame. The owner being desirous of obtaining another calf from her, she 
was kept alive with gruel ; but, as it was soon seen she could not live, so 
as to give birth to a calf, she was destroyed. This being about a fortnight 
before her time, the calf was immediately taken out, and it seemed likely to 
live and do well. It, however, lived only three days ; the immediate cause 
of death being injudicious feeding.” 
Examination of the diseased parts . — The left eyeball had en- 
tirely disappeared, and the anterior half of the orbit contained 
only a blackish-brown mass, about the consistence of soft 
cheese. The muscles of mastication on the left side of the 
head were nearly wasted away, and w'hen cut into, they pre- 
sented the appearance of dark fawn-coloured matter ; this 
being degenerated muscular tissue, mixed with tendinous 
fibre. In bulk they were fully two thirds smaller than the 
corresponding muscles on the opposite side of the head. 
Mental inquiry as to the cause of the condition of these 
muscles, directed the mind at once to the state of the inferior 
division of the fifth nerve, and a probability of the lateral 
nasal of the ophthalmic division being alsoaffected. To insure, 
however, a thorough investigation, I carefully dissected the 
several organs as they presented themselves ; and not only 
those on the affected side of the head, but likewise those on 
the opposite side ; for the purpose of comparing one vrith the 
other as I proceeded. The muscles were raised one by one ; 
the nerves traced to the base of the cranium ; and the arteries, 
and veins of the head, and also the glands, with their ducts, 
were all carefully examined by me. 
I have before stated, that the muscles of mastication on the 
left side were atrophied to a great extent ; and I may also 
add, that they were completely paralysed. The branches of 
the third divisions of the fifth nerve, up to within about two 
inches of the sphenoid bone, were very much attenuated, pos- 
sessing the character of reddish-grey membranous cords only, 
w ith the exception of one branch of the ophthalmic, the lateral 
nasal ; the condition of w hich I shall presently allude to. 
The inferior maxillary division from the foramen-lacerum- 
basis cranii, and the superior maxillary division from the 
foramen in the sphenoid bone, for at least two inches in 
length, were as thick again as natural, and very dense in 
structure. The spheno-palat.ine branches of the fifth, em- 
bracing Mickel’s ganglion, especially, were very much en- 
larged, unusually hard, and when cut through the sensation 
of cutting hard bacon was experienced. The lateral-nasal 
and inferior-trochlea branch, from the point where it is given 
off from the ophthalmic to its entrance into the upper part of 
