. The principles of surgery . Fie. 130. thrown off, and a healthy foundation for repair obtained. This canonly be accomplished by an effort of the part itself; by ulcerationcrumbling down the carious and unnaturally cancellated part, and leavingthe surrounding normal texture unattacked ; ceasing when it comesthere, its task having been accomplished, and giving place to the repa-rative effort already there begun. Or ulceration maybe accelerated, orat all events mixed up with more continuous deathof the unprofitable part—necrosis. Such destructive process, especially that bysimple ulceration, ma
. The principles of surgery . Fie. 130. thrown off, and a healthy foundation for repair obtained. This canonly be accomplished by an effort of the part itself; by ulcerationcrumbling down the carious and unnaturally cancellated part, and leavingthe surrounding normal texture unattacked ; ceasing when it comesthere, its task having been accomplished, and giving place to the repa-rative effort already there begun. Or ulceration maybe accelerated, orat all events mixed up with more continuous deathof the unprofitable part—necrosis. Such destructive process, especially that bysimple ulceration, may advance leisurely andquietly ; without any communication with the ex-ternal atmosphere. One of two events may thenoecur. The skin may continue unbroken; thepurulent matter becoming absorbed, as well as themolecular debris of the bone which is then com-mingled with it; and this, it is plain, can onlyhappen when the disease is of limited extent, andthe process altogether chronic in its nature. Orthe abscess, with its contai
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