Lamb, John 1735-1800 New York Mathematical Mendenhall, Thomas fl. 1775 Lancaster, Pa. Mathematical; clocks Miller, Aaron fl. 1748-1771 Elizabethtown, Surveying; clocks; N.J. compasses Morris, M. fl. 1785 New York Protractors Newell, Andrew 1749-1798 Boston Mathematical; compasses Newell, Joseph fl. 1800-1813 Boston Surveying Pease, Paul fl. 1750 Probably Rhode Quadrant Island Platt, Augustus 1793-1886 Columbus, Ohio Mathematical; surveying Platt, Benjamin 1757-1833 Danbury, Compasses; Litchfield, and surveying; clocks New Milford, Conn.; Lanesboro, Mass.; Columbus, Ohio Pope, Joseph 1750-1826 Boston Scientific; clocks Potter, John fl. 1746-1818 Brookfield, Mass. Surveying Potts, W. L. late 18th Bucks County, Pa. Surveying century Prince, John 1751-1836 Salem, Mass. Scientific (practitioner) Prince, Nathan fl. 1743 Boston (practitioner) Pryor, Thomas fl. 1778 Philadelphia Mathematical Revere, Paul 1735-1818 Boston Gunnery Rittenhouse, 1740-c.1820 Philadelphia Astronomical; Benjamin surveying Rittenhouse, David 1732-1796 Philadelphia and Astronomical; (practitioner) Norriton, Pa. surveying Rittenhouse & Evans fl. 1770's Philadelphia Surveying Sibley & Marble late 18th New Haven, Conn. Mathematical; (Clark Sibley and century clocks; watches Simeon Marble) Smith, Cordial fl. 1775 Connecticut Surveying Sommer, widow fl. 1753 New York Optical Balthaser Sower, Christopher c. 1724-1740 Germantown and Mathematical; Philadelphia, Pa. clocks Stiles & Baldwin fl. 1791 Northampton, Surveying (Jedidiah Baldwin) Mass. Stiles & Storrs fl. 1792 Northampton, Surveying (Nathan Storrs and Mass. Jedidiah Baldwin) Taws, Charles fl. 1795 Philadelphia Mathematical Thacher, Charles 18th century Probably Boston Surveying