General Diseases. 293 
advisabie treatment, except when the deposit takes place 
in situations other than the mammary gland, and where 
it would be impossible, with safety, to use the knife. 
Counter-irritation, or the daily application of iodine, would 
then be indicated, but absorption in such cases is hopeless. 
Osseous Tumours.—These are of comparatively rare 
occurrence in the dog. When seen, they are usually found 
in connection with the limbs, more especially about the 
hocks and knees,* and are generally associated with the 
disease called “rickets,” for the treatment of which see 
‘*Rickets.” 
Melanotic Tuimour—Melanosis is, I believe, an unre- 
corded, if not almost an unknown, disease in the dog. To 
Mr. Fleming I am indebted for the following particulars of 
an interesting case which came under his own notice : 
“A large, black, well-bred setter was brought to me for 
advice, with regard to a swelling on the back part of his 
fore-leg. The skin was very much thickened from the 
elbow to near the carpus, and destitute of hair. The en- 
* At the present time I have a patient, a mastiff, under my care, 
with an enormous osseous tumour of honeycomb or cancellated struc- 
ture, surrounding the lower end of the radius. Though the knee-joint 
is not involved, yet the foot is comparatively useless, being greatly 
swollen, benumbed, and dangling, owing to the pressure by the tumour 
on the structures above. The friction of, or injury by, the chain, is sup- 
posed to have been the original cause of the disease. Prior to my ad- 
vice being sought, it had been under the treatment of other veterinary 
surgeons, without any successful results. For the first ten days I had 
applied, externally, absorbents and hot fomentations ; in the softest 
portions I lanced it, and there was discharged from the two openings 
made, a thin bloody fluid, not offensive, and containing no pus. The 
probe came in contact everywhere with rough, spongy bone. The 
fomentations are continued, with an occasional injection of a strong 
solution of nitrate of silver. Iron and iodine are administered twice 
daily, and the food is of a substantial nature. The poor creature is 
much emaciated, but is now slightly improving, and the pain and 
swelling have abated. An entire removal of the deposit is, of course, 
out of the question, but I have good hopes of prolonging the animal’s 
life, and rendering him useful. 
