B66-477 WOODEN SURVEYOR'S GRAPHOMETER. Noah Bosworth. Semi-circular wooden body, 9" in diameter, including trough compass with 6-1/2" needle and paper background with inked fleur-de-lis. Sighting vanes on adjustable wooden arms. Stamped "N. Bosworth 1817." Noah Bosworth (1778-1837) was born and lived in Halifax, and also worked for a time in Boston. There are two other examples of his graphometers, dated 1823 and 1824, in the Smithsonian's collection.This one is in immaculate condition and an important part of early American surveying history. From the collection of Chuck Morgan. Fine 500-1000