CHAPTER VII. 
ligaments or glands difeafed, nor matter in thejoynt, nor the bones caries, 
or any difeafed appearance, except that the ends of the bones are a little 
larger and fofter. 
Not only thefe parts but even the large medullary cavities of the cy¬ 
lindrical bones have fometimes matter formed in them (Tab. xlix.) which 
conftantly increafing and wanting vent, will partly by corroding and ren¬ 
dering the bone carious, and partly by preffure tear afundcr the ftrongeft 
bone in an human body, of which I have known feveral inftances (Tab. 
xlix.) in one cafe where the matter had fufficient difeharge by an exter¬ 
nal caries formed together with the internal one, all the internal hard 
part of the bone which contains the medulla was feparated from the reft, 
•and being drawn out through the place where the external caries made a 
vent, the patient received a perfed cure. (Tab. xlix.) Another cafe of this 
kind, where the internal part which contains the medulla was alfo fepa¬ 
rated from the reft, and there being holes through which the matter was 
difeharged, but none fufficient to take out the exfoliated bone; the mat¬ 
ter continued to flow in great quantity till it deftroyed the patient; (Tab. 
lv.) and poffibly if this cafe had been rightly known, the internal ex¬ 
foliated part might have been taken out, and the patient cured: In both 
thefe cafes it feems as if only fo much of the internal part of the bone 
was become carious as receives nourifhment from the artery which en¬ 
ters the middle of the bone; and as a caries is a mortification of a bone, 
might not this difeafe arife from a hurt in the veffel which nourifhes 
that particular part. Thefe are the moft common difeafes of the bones; 
others defcribcd in the prints and explained in the references, would have 
been treated of more largely in this chapter if there had been room. 
