Auction: Clocks, Watches & Scientific Instruments - 2248Location: BoltonDate / Time: September 11, 2004 12:00PM
Description:
Circumferentor Drawing Aid, by Henry Wadsworth, Duxbury, Mass., with circular card disc, brass alidade (lacking attachment) and pine box with label The Surveyor's Assistant, a Scientific and Short Hand Method to Draw a Map or a Plan, Determine Distances & c., patent date August 21 1877, lg. 21 1/2 in.
Estimate $800-1,200
/208/514208.jpg)
/083/548083.jpg)
/082/519082.jpg)
/107/528107.jpg)
/144/528144.jpg)
/146/528146.jpg)
/109/528109.jpg)
/024/522024.jpg)
