260 THE DISEASES OF THE D06. 



the legs and on the scrotum. Professor Bennett, in his 

 ' Principles and Practice of Medicine/ gives some inter- 

 esting figures of the bones of a dog which introduced 

 much mercury into his system by licking vermilion paint. 

 Numerous cancerous-like masses were found in the lungs 

 and internal viscera, and the skeleton had undergone 

 most remarkable changes in the long bones, mainly of 

 the shafts, not of their extremities. " The disease closely 

 resembles what may be observed in many other specimens 

 of so-called syphilitic disease, yet in this dog we have the 



Pio. 86.— Skeleton of dog. Effects of mercury (Williams). (After 

 Professor Bennett.) 



positive proof that it was caused by mercury, as all 

 attempts to communicate syphilis to dogs have failed." 



Vegetable poisoning is not common in the dog ; the 

 toxic agents from which he suffers are generally 

 mineral, and picked up accidentally or intentionally with 

 meat or other animal substance. Hounds are liable to 

 Buffer from poison, either as intended for destruction of 

 foxes or actually designed to destroy the pack with a 

 view to " boycotting " hunting. Poison intended for cats 

 or for various kinds of vermin may be eaten by dogs ; 



