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4037. INVENTIONS, Polygraph.—[continued].

It is for copying with
one pen while you write with the other, and
without the least additional embarrassment or
exertion to the writer. I think it the finest invention
of the present age. * * * As a secretary
which copies for us what we write without
the power of revealing it, I find it a most
precious possession to a man in public business.—
To James Bowdoin. Washington ed. vi, 17.
(W. 1806)