[ 208 ] 
G, An Exoftofis, or callous Expanfion on the exter- 
nal Surface of the Os Humeriy attached to it by 
a cartilaginous Subftance forming a Creft there, 
about two Inches long, and half an Inch high; 
which, being wedged in between the Interftices of 
the Mufcles, by their Motion hath been kept in 
fome meafure loofe upon it. 
It is obfervable, that, during Life, the Subftance of 
this Bone had been render'd fo foft, as to have yielded 
when prefled upon, if it had not been ftiffened by the 
indurated callous Shell, or Exoftofis, fpread over it, 
wherewith it was incrufted from one End to the other : 
And this indurated callous Subftance, feemingly im- 
bodied in the Bone internally, ending externally in 
a grifly, flefhy, and gelatinous Subftance : All which, 
flicking to the Bone, added greatly to the apparent 
Tumour of it; as doubtlefs, in time, that would have 
been one with it ; it appearing that all thefe Subftances 
would have acquired the Confiftency of it; tho', as yet, 
they had only attained that of a Callus in its Infancy. 
Fig. 2. 
A tubular Exfoliation from all the Circumference 
of the medullary Cavity of the Os Humeriy fe- 
ven Inches in Length, and near two in Circum- 
ference; which, lying loofe and detached from 
the main Bone, was extra&ed whole thro' the 
large Opening made in it. 
And thus, upon the Whole, it appears, that the In- 
flammation, Suppuration, and Ulcer in the Medulla , 
in the firft place, has brought about the Confumption 
of the Medulla within the Bone ; and, foon after, 
fuch an Alteration in it, as hath given Caufe to the 
> Exfoliation 
