OSTEO-POROSISi 



185 



Mr. Robinson of Greenock, have seen it frequently ; and I am 

 indebted to them for many valuable hints upon the pecvdiarity 

 of the symptoms, and for specimens of the bones of the head 

 sufiferinj; from the disease. 



Fig. 31. 



Fig. 32. 



Figs. 31 and 32. — Cranio-facial bones aflFected with osteo-poroBis ; the 

 front view, Fig. 31, representing the enlarged condition of the face ; and 

 Fig. 32 showing the disease extended into the alveolar cavities. 



As a rule, the bones of the face are the first to suffer ; but 

 this is -liable to exceptions, as the following extracts from the 

 Veterinarian of 1860 will show. The symptoms were de- 

 scribed to Mr. Yarnell by a Mr. Wallin : — " My attention," says 

 Mr. Wallin, " was in most instances first directed to defective 

 action, perhaps in one joint or limb only, in. which, upon exami- 



