Description
Phelps & Gurley Surveyor's Transit: Phelps & Gurley Surveyor's Transit, c. 1850, 6-1/2-in. engraved silvered dial marked "Phelps & Gurley/West Troy, N. Y. , " concentric circle center engraving, single spirit level, arched "A"-frame supports with vertical scale and a 9-in. scope, housed in a mahogany box with...