JAMES WEIR, JR., M.D.

New York
THE MACMILLAN COMPANY
LONDON: MACMILLAN & CO., Ltd.
1899

Norwood Press
J. S. Cushing & Co.—Berwick & Smith
Norwood Mass. U.S.A.

To My Father

WHO, WHILE NOT A SCIENTIST, HAS YET TAKEN

AN INTELLIGENT AND APPRECIATIVE

INTEREST IN MY WORK

THIS BOOK IS RESPECTFULLY DEDICATED