Circumferentor Drawing Aid
- Sold for:
- Clocks, Watches & Scientific Instruments - 2248
- Date / Time :
- September 11, 2004 12:00PM
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.