"The Surveyor's Assistant" by Henry Wadsworth

Description:

"The Surveyor's Assistant" by Henry Wadsworth, Duxbury, Mass., Patd. August 21st. 1877, with 4 1/2-inch circular card disc, moving brass arm, pine drawing board and stained mahogany case with maker's label Henry Wadsworth, Proprietor and Inventor of the Circumferentor, The Surveyor's Assistant, a Scientific and Short Hand Method to Draw a Map or Plan, Determine Distances & C., lg. 21 3/4 in.
Estimate $300-400

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