BOSTON, August 15, 1883.

This certifies that I removed in the back of Mr. J.D. Moore a tumor weighing two pounds and three-quarters. The time occupied was twenty-two minutes. The patient was insensible during the whole operation, and came out from the influence of the anaesthetic speedily and perfectly, without nausea or any ill effects. The agent used was prepared by Dr. U.K. Mayo, the dentist, a new discovery of his own. I consider this anaesthetic the safest the world has yet seen.

WM. H. THORNDIKE, M.D., 92 Boylston, Street.

S.M. SPENCER'S

STENCIL AND RUBBER STAMP WORKS, 112 WASHINGTON ST., BOSTON, MASS.

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