From Ruysch's cabinet. Note the pathetic pose of the foetal skeleton at the top. He is playing left-handed with an injected artery as a bow on a sequestrum as a violin. Note also the feather borne by another to the left; the coils of intestine (probably his own) by a third to the right, who also holds in his other hand an injection of the pampiniform plexus; the vesical vase to the extreme left; the touching symbolism of the recumbent skeleton and its butterfly; and the rockery of calculi interspersed with arterial and other injections. Ruysch's Thesaurus Anatomicus, III. Amstel. 1703.

ADDRESSES

AND OTHER PAPERS

BY

WILLIAM WILLIAMS KEEN

M.D., LL.D., F.R.C.S. (HON.)

Professor of Surgery, Jefferson Medical College, Philadelphia; Membre
Correspondant Étranger de la Société de Chirurgie de Paris;
Membre Honoraire de la Société Belge de Chirurgie; Ehren-
mitglied der Deutschen Gesellschaft für Chirurgie; Honorary
Member of the Clinical Society of London, etc.

Copyright, 1905, by W. B. Saunders & Company.

Hin H K26 1905

PREFACE.

These occasional addresses and other papers are published in the hope that they may prove useful both to the profession and to the public and in response to numerous requests.

I trust that a few repetitions will be forgiven inasmuch as the audiences were different and the facts important. Of course the statistics and allusions to current events must be read as of the date when the addresses were originally delivered and not of the date of the present volume.

I have to thank the Editors and Publishers of the various periodicals and books in which some of the papers first appeared for permission to republish them.

PHILADELPHIA, May 8, 1905.

WILLIAM W. KEEN.