Smithsonian - National Museum of American History, Behring Center

 
Physical Sciences Collection - Surveying and Geodesy

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Draper

Edmund Draper (1805–1882) apprenticed with Benjamin Stancliffe in Philadelphia and worked in partnership with him for a few years. By 1832 he was in business on his own, making and repairing "Theodolites, Engineer’s Levels, Surveyor’s Compasses, &c." He also built a dividing engine. At the time, the only other dividing engine in the United States was that built by William J. Young, also of Philadelphia. Since Draper never published a catalog or price list, it is difficult to know how many different instruments he made, or how much each one cost. He apparently began using serial numbers around 1860, and produced some 28 instruments a year.

Ref: Robert C. Miller, "Benjamin Stancliffe and His Successors: A Century of Mathematical Instrument Makers in Philadelphia," Rittenhouse 11 (1996): 1–13.

Collection:

Surveyor's Vernier Compass #468
Surveyor's Vernier Compass marked “B. Stancliffe”
Wye Level #294