Rare Lebbeus Dod Brass Protractor and Parallel Rule

Description:

Rare Lebbeus Dod Brass Protractor and Parallel Rule, Mendham, New Jersey, late 18th century, engraved brass instrument with protractor divided in 10 degrees 10-90-10, spring-fitted knife-edge arm, signed "L. Dod Mendham" on bottom section, and mounted to the upper portion of the stationary arm of the parallel rules that have S-shaped hinges connecting the lower knife-edge rule, overall lg. 12 in.

Note: Credited with the invention of the parallel rule protractor, Lebbeus Dod (1739-1816) was a manufacturer of mathematical instruments in New Jersey. Also known for making muskets, he served as a captain of artillery during the Revolutionary War. His three sons, Stephen, Abner, and Daniel, were also mathematical instrument and clock makers. This example has been in a New Jersey family for over three decades.
Estimate $2,000-3,000


Items may have wear and tear, imperfections, or the effects of aging. Any condition statement given, as a courtesy to a client, is only an opinion and should not be treated as a statement of fact. Skinner shall have no responsibility for any error or omission.

Keywords