Fic. V.— Humero-radial and femoro-tibial articulations, showing extensive disease, with deep 
erosions and abundant marginal exostoses. The specific gravity of these bones is greatly decreased. 
Fic. VI.—A series of ringbones, showing in the two upper rows the interphalangeal articular 
surface, with erosions ; and in the lower rows the same specimens showing the exostoses. 
