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MY attention has been lately called to this rare dis- ease, in consequence of being so fortunate as to have the opportunity, in two cases, of tracing its progress during life, and examining the morbid appearances after death.There are many such cases on record, notwithstanding the rarity of their occurrence.But there is considerable difference of opinion as to the real nature of the disease.Dr. Kilian,* who is, I believe, one of the latest writers on this subject, states that the disease presents itself under two very distinct forms." In the one, the bones generally, but especially the bones of the pelvis, present a dirty brownish grey colour, not transparent where thin, and
Samuel Solly (Mon,) studied this question.