240 HEREDITARY PHTHISIS IN AND TUBERCLES ON THE 
membrane of the mouth, and on account of the masticatory efforts 
which they require. 
This kind of regimen must be continued during a time whose 
duration is proportional to the extent of the wounds made by 
the operation, and to the nature of the deformity of the masti- 
catory apparatus. It is for this reason that it is necessary to insist 
on the use of aliments easy of mastication when the level of 
the dental tables is much deranged, or they are worn down to the 
level of the gums. 
When one of the molars is deficient, the tooth correspondent to 
it in the opposite jaw, from its indiscontinued growth, and not 
being worn by its antagonist, becomes, one day or other, an obstacle 
to the performance of mastication by striking against the opposite 
gum, or preventing the free lateral action of the jaws, by locking 
itself between the two teeth situated at each side of the empty 
alveole. It is, therefore, necessary to see from time to time the 
animals that have been so operated upon, in order to re-establish 
the level of all the molars when that which is not worn becomes 
exuberant. 
Such are the considerations that this subject has appeared to 
us to merit; but, to render them more complete still, we shall place 
on record some accounts of cases extracted from our practice, in 
which may be found proofs of the efficacy of the operations, and 
other treatment, that we have recommended. 
[To be continued.] 
HEREDITARY PHTHISIS IN AND TUBERCLES ON 
THE PIA MATER OR TUNICA ARACH- 
NOIDES, OF A BULL CALF. 
By Mr. W. A. Cartwright, V. S., Whitchurch , Salop. 
On the 20th January, 1844, I was called in to attend a bull 
calf, about nine months old, of the short-horned breed, the pro- 
perty of G. Gill, Esq., of the Twemlows. He had been noticed 
a day or two before as unwell, on account of his hanging out his 
tongue, and was consequently brought home. 
Symptoms . — The principal ones that attracted our notice were, 
hanging his tongue out four or five inches, and slavering consi- 
derably. He would occasionally draw his tongue in, but it gene- 
