Nitrous Oxide first used in dentistry by Dr. Horace Wells, of Hartford,
Conn., December 1 1, L844.
Dr. S. 0. Barnuin discovered the use of rubber dam in connection with
dentistry in 1870.
The National Association of Dental Faculties was organized ill New York
in 1884, Dr. C. X. Pierce as chairman.
The National Association of Dental Examiners was organized in 1889.
Celluloid lir.-t used as a base for artificial dentures in 1869.
Dr. J. C. Warren, of Boston, was the first to operate for cleft palate in
the United Stales.
Rubber as a base of artificial dentures was first used by Dr. Putnam, of
New York, in 1853.
The use of ether was introduced into dentistry by Dr. W. T. G. Morton
in 1849. Chloroform was introduced by Prof. J. Y. Simpson, of Edinburg,
1!. F. Green, of Kalamazoo. Mich., made he first denial engine in 1868.
Il was worked with a fool-bellows, and the hand-piece would carry files, drills,
—J. R. M.