embrane previously occupied by cicatricial tissue, and was the first
to show that on mucous surfaces, mucous membrane remains mucous
membrane, but when transplanted to skin, it becomes skin. Attempts
have been made to transplant a button of clear cornea of a dog, rabbit,
or cat to the cornea of a human being, opaque as the result of
ophthalmia, and von Hippel has devised a special method of doing this.
Recently Fuchs has reported his experience in cornea-grafting in
sections, as a substitute for von Hippel's method, in parenchymatous
keratitis and corneal staphyloma, and though not eminently successful
himself, he considers the operation worthy of trial in cases that are
without help, and doomed to blindness.

John Hunter was the first to perform the implantation of teeth; and
Younger the first to transplant the teeth of man in the jaws of man;
the initial operation should be called replantation, as it was merely
the replacement of a tooth in a socket from which it had accidentally
or intentionally been removed. Hunter drilled a hole in a cock's comb
and inserted a tooth, and held it by a ligature. Younger drilled a hole
in a man's jaw and implanted a tooth, and proved that it was not
necessary to use a fresh tooth. Ottolengni mentions the case of a man
who was struck by a ruffian and had his two central incisors knocked
out. He searched for them, washed them in warm water, carefully washed
the teeth-sockets, and gently placed the teeth back in their position,
where they remained firmly attached. At the time of report, six years
after the accident, they were still firmly in position. Pettyjohn
reports a successful case of tooth-replantation in his young daughter
of two, who fell on the cellar stairs, completely excising the central
incisors. The alveolar process of the right jaw was fractured, and the
gum lacerated to the entire length of the root. The teeth were placed
in a tepid normal saline solution, and the child chloroformed, narcosis
being induced in sleep; the gums were cleaned antiseptically, and 3 1/2
hours afterward the child had the teeth firmly in place. They had been
out of the mouth fully an hour. Four weeks afterward they were as firm
as ever. By their experiments Gluck and Magnus prove that there is a
return of activity after transplantation of muscle. After excision of
malignant tumors of muscles, Helferich of Munich, and Lange of New
York, have filled the gap left by the excision of the muscle affec