012 CONTRIBUTIONS TO VETERINARY MEDICINE. 
of marts, Smithfield. I also learned that she had had many 
masters within the last few weeks. 
Remarks .—A careful examination of the molar teeth of this 
mare proved that no anormal dental cause existed to account 
for the presence of these symptoms; nor can they be attri¬ 
buted, I deem, to the recent administration of mercury. The 
absence of tenderness and pain during the act of mastication 
will negative such an hypothesis; although it is probable 
that the use of, at a somewhat remote period, an excess of 
this mineral agent may have been the original exciting cause 
of this apparently chronic state of salivation. 
That it was an affection of some standing is evidenced by 
the facts, that the dealer had had her in his possession for 
some few weeks, and had admitted her to be a u slaverer,” 
but not an mS unsound hanimalj” and further, that some weeks 
had elapsed from her leaving my infirmary until her death, 
during which period I learned she continued to discharge 
frothy saliva in undiminished quantities. 
CONTRIBUTIONS TO VETERINARY MEDICINE. 
By W. Gavin, M.R.C.S., Malton, York. 
Necrosis and Fracture of the Tibia. 
Dear Sir, — I enclose you a portion of the radius of a 
fox-terrier, which came under my care in August, 1847, 
through the following circumstance. The dog was sleeping 
in a corn-field while the mowers were at work, when, unfor¬ 
tunately, a scythe came in contact with the dog’s left fore¬ 
leg, dividing everything to the bone, a quarter of an inch 
below the elbow-joint, on the inside. In two or three days, 
notwithstanding all I could do, mortification came on in the 
toes and paw, gradually proceeding upwards, caused by the 
division of all the great blood-vessels of the limb. I stated the 
case to the owner, who intended destroying him; but I pre¬ 
vailed on him to give me the patient, as I wished to try what 
could be done for the case. The skin on the inside of the 
wrist was dead, but sound on the outside; which enabled me 
to get a more favorable flap after I had removed the paw 
and ends of the radius and ulna (see the broad end of the 
enclosed bone). I was doubtful of having left a greater 
