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son, the practice has fallen into disuse, almost entirely, and
very justly so. Syphilitic, and other most dangerous diseases
have been propagated this way, even when the individuals
from whom the scion tooth had been extracted were in appa-
rently perfect health. I will give one case of this kind, to
show the reader what consequences may arise from this
cause, believing that, in this country, this operation will rare-
ly, if ever, be performed. This ease was drawn up by Dr.
Watson, and inserted in the Medical Transactions, Vol. 111.
Art. XX.

Case*

"An incisor tooth of the upper jaw, from an unknown
cause becoming carious, in a young unmarried lady about
twenty-one years of age, it was extracted, and its place very
dexterously supplied by a like tooth from another young wo-
man, who, upon examination for the purpose, appeared to
be in good health. The scion very rapid!}" took firm hold,
and soon bid fair to be of great service and ornament. In
about a month, however, the mouth became painful ; the
gums inflamed, discoloured and ulcerated. The ulceration
spread very fast, the gums of the upper jaw were corroded,
and the alveoli left bare. -Before the end of another month
the ulceration stretched outwardly under the upper lip and
nose, and inwardly to the cheeks and throat, which were
corroded by large, deep, and fetid ulcers. The alveoli so«>n
became carious ; several of the teeth gradually dropped out,
an'l, at length, the transplanted tooth, which had hitherto re-
mained firm in its place. About this time, blotches appeared in

'As quoted by J. M. Good, study of Med. vol. I, i age 44.