Of the Caries or Ulcer of the Bones, Exostosis, and Nodus.
What is Caries?
It is the Putrifaction of the Substance of the Bone, or else its Ulcer or Gangrene.
Whence doth the Caries of the Bone derive its Original?
It proceeds from an internal and external Cause; the former being that which hath been produc'd at first in the Substance of the Bone; and the other that which takes its Rise from an inveterate Ulcer in the Flesh, which hath communicated its Malignity to the Substance of the Bone, and by that means corrupted it.
How is the Caries known which proceeds from an inward Cause?
By the continual and violent Pains which are felt before, and continue for a long time without diminution; as also afterward by the alteration of the Flesh that covers the Bone, and which becomes soft, spongy, and livid.
By what means is a Caries that derives its Origine from an outward Cause, discover'd?
By the quality of the purulent Matter that issueth out of the Ulcer in the Flesh, which is blackish, Unctuous, and extremely stinking; as also by the help of the Probe, that discovereth