Mahogany, brass, green baize; 25.4 x 61.3 x 43.2 (10 x 24 1/8 x 17 in.) Monticello, VA.
Jefferson used a series of these machines for making copies of letters from 1806 until his death. As Peale made improvements on the original design, Jefferson would get a new one. By 1809 he wrote that
the use of the polygraph has spoiled me for the old copying press the copies of which are hardly ever legible.... I could not, now therefore, live without the Polygraph.