Lamb, John (1735-1800), New York; also made surveying and mathematical instruments.
Newell, Andrew (1749-1798), Boston; also made mathematical instruments.
Pease, Paul (fl. 1750), probably Rhode Island.
Thaxter, Samuel (1769-1842), Boston; also made mathematical and surveying instruments.
Warren, Benjamin (fl. 1740-1790), Plymouth, Mass.; also made surveying instruments.
Williams, William (1737/38-1792), Boston; also made mathematical instruments.
OPTICAL
Benson, John (fl. 1793-1797).
Clark, Robert (fl. 1785), Charleston, S.C.; also made nautical and surveying instruments.
Sommer, Widow Balthaser (fl. 1753), New York.