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HISTOEY OF DENTAL SUEGERY 87

have got safe to your hands. If you shoulil return to Connecticut, I should be glad to
be advised of it, and to what place, as I shall always prefer your services to those of
any other in the line of your present profession.
I am, sir,
Your very humble servant,
G. Washington.
Although Fauchard, in 1728, describes the u.se of flat springs, and de
Chamant, a few years later, spiral springs as a means of holding upper and
lower substitutes in position, it is claimed by his son that John Greenwood
was the first to employ these in dental practice iu the United States.
John Greenwood went to Paris about 18UG, his sou says, to procure a

Isaac .John Greenwood's method of inserting pivot teeth on wood pivots.

keg of natural human teeth. After his return from France lie announced
in the "Weekly Museum"' of March 7, 1807:
J. Greenwood, Surgeon Dentist,—Informs his friends and the publick ui general
that he has returned from Paris, with great improvements in the line of his profes-
sion, and attends to his business as usual at No. 83 Beekman Street.
He died November 16, 1819 at the age of fifty-nine. He was suc-
ceeded in his practice by his two sons, Isaac John and Clark.

ISAAC .JOHN GREENWOOD.
Isaac John Greenwood, the son of John Greenwood, is authority for the
following statement:
"There was buried, in the tomb at Mount \'ernon, in the mouth of
George Washington, a pair of false jaws with human teeth on, which were