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LUNSFORD P. YANDELL, M. D.
PROFESSOR OF PHYSIOLOGY AND PATHOLOGICAL ANATOMY, IN THE
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ART. 1.-LECTURES ON DISEASES OF THE SKIN. By AUSTIN FLINT,
ART. I.-LECTURES ON DISEASES OF THE SKIN.
BY AUSTIN FLINT, M. D., PROFESSOR OF THE THEORY AND PRACTICE OF MEDICINE IN THE UNIVERSITY OF LOUISVILLE, KY.
In the diagnosis of cutaneous affections, the first question which arises whenever a case comes under notice, is, to which of the eight orders does it properly belong. Having the distinctive character of each order before the mind, we are to determine whether on the one hand, those distinctive of any one of the orders are present, and, on the other hand, those distinctive of the other orders are absent. Here, as in the diagnosis of other affections, we are to take into view positive and negative facts; in other words, to reason from what is actually observed, and, by way of exclusion, also from what we do not observe. One source of difficulty in the diagnosis lies in the fact that the disease generally has existed for a greater or less period, and it is not always easy to determine what were the characters presented at its development, or early stage. In the progress of cutaneous affections not only do they come to resemble each other in their external characters, but, in some instances, they actually verge one into another, or become complicated by union with each other. Thus