Holcomb, Amasa (1785-1875), Southwick, Mass.; also made astronomical in- 

 struments. 



Houghton, Rowland (c 1678-1744), Boston. 



Huntington, Gordon (1763-1804), Windham, Conn., and Walpole, N.H.; also 

 made clocks and other scientific instruments. 



Jacks, James (fl. 1780's), Charleston, S.C.; also made mathematical instruments. 



Kennard, John (1782-1861), Newmarket, N.H.; also made clocks. 



Lamb, A., & Son (1780's), New York; also made mathematical and nautical 

 instruments. 



Lamb, Anthony (1703-1784), New York; also made mathematical and nautical 

 instruments. 



Lamb, John (1735-1800), New York; also made mathematical and nautical 

 instruments. 



Miller, Aaron (fl. 1748-1771), Elizabeth, N.J.; also made clocks and directional 

 compasses. 



Newell, Andrew (1749-1798), Boston; also made mathematical instruments and 

 directional compasses. 



Piatt, Augustus (1809-1886), Columbus, Ohio; also made mathematical and 

 surveying instruments. 



Piatt, Benjamin (1757-1833), Danbury, Litchfield, and New Milford, Conn.; 

 Lanesboro, Mass.; and Columbus, Ohio; also made directional compasses 

 and clocks. 



Potter, John (fl. 1785), Brookfield, Mass. 



Rittenhouse, Benjamin (1740-c. 1820), Philadelphia; also made astronomical 

 instruments. 



Rittenhouse, David (1732-1796), Philadelphia; also made astronomical instru- 

 ments. 



Rittenhouse & Evans (fl. 1770's), Philadelphia. 



Stiles & Baldwin (fl. 1791), Northampton, Mass. 



Stiles & Storrs (fl. 1792), Northampton, Mass. 



Thacher, Charles, probably Boston. 



Thaxter, Samuel (1769-1842), Boston; also made nautical and mathematical 

 instruments. 



Wall, George Jr. (fl. 1788), Bucks County, Pa. 



Warren, Benjamin (fl. 1740-1790), Plymouth, Mass.; also made nautical instru- 

 ments. 



White, Peregrine (1747-1834), Woodstock, Conn.; also made clocks. 



Whitney, Thomas (fl. 1798-1821), Philadelphia; also made mathematical and 

 optical instruments. 



Williams, William (1737/38-1792), Boston; also made nautical instruments. 



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