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HARVARUNIVERSITY
SCHOOL OF MEDICINE AND PUBLIC HEALTM

LIBRARY

Transferred from Harrard Dental School Library

6 FEB 1936
AI3,P.1857.1

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PREFACE TO THE SECOND EDITION.

The demand for a reprint of this work affords an opportunity of furnishing some additional facts relative to the communicability of syphilis in its secondary, as well as in its more advanced stages, and also on the subject of treatment—two points on which authors are still far from being generally agreed.

In reference to the first of these questions, my experience during the past six years has served to confirm the belief before expressed, that not only is the matter of secondary sores capable of reproducing disease of similar character by inoculation; but that lingering taints, the existence of which is scarcely, if at all recognisable by external phenomena, are also communicable through sexual, if not through other media, and thence liable to be continued in the offspring.

The recent experiments of Mr. Wallace leave no room to doubt the validity of this doctrine; and Dr. Waller of Prague has shown that, in order to reproduce the phenomena of secondary accidents by inoculation, it is by no means necessary to use the concentrated poison as met with in form of cutaneous deposit, but that a much more diluted state of it is quite sufficient: this pathologist having succeeded in implanting the disease by inserting the blood of an infected person on the

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