Thaxter, Samuel 1769-1842 Boston Nautical; mathematical surveying Voight, Henry 1738-1814 Philadelphia Astronomical; clocks; watches Wall, George, Jr. fl. 1788 Bucks County, Pa. Surveying Walpole, Charles fl. 1746 New York Mathematical Warren, Benjamin fl. 1740-1790 Plymouth, Mass. Surveying; nautical White, Peregrine 1747-1834 Woodstock, Conn. Surveying; clocks Whitney, John fl. 1801 Philadelphia Mathematical; optical Whitney, Thomas fl. 1798-1823 Philadelphia Mathematical; optical; surveying Williams, William 1737 or Boston Mathematical; 1738-1792 nautical Willis, Arthur fl. 1674 Possibly (practitioner) Massachusetts Wilson, James 1763-1855 Bradford, Vt. Globes Wistar, Richard fl. 1752 Wistarburg, N.J. Glass Witt, Christopher fl. 1710-1765 Germantown, Pa. Mathematical; (practitioner) clocks Wood, John fl. 1790 Philadelphia Compasses Youle, James 1740-1786 New York Surgical Youle, John fl. 1786 New York Surgical MATHEMATICAL PRACTITIONERS AND INSTRUMENT MAKERS _Geographical Listing_ CONNECTICUT Coventry: Daniel Burnap (1759-1838); surveying instruments and clocks. Danbury: Benjamin Platt (1757-1833); compasses and clocks. East Windsor: Daniel Burnap (1759-1838); surveying instruments and clocks. Hartford: Enos Doolittle (1751-1806); surveying and navigational instruments, compasses, and clocks. Litchfield: Benjamin Hanks (1755-1824); surveying instruments and clocks. Truman Hanks (fl. 1808); surveying instruments. Benjamin Platt (1757-1833); compasses and clocks. Mansfield: Benjamin Hanks (1755-1824); surveying instruments. Truman Hanks (fl. 1808); surveying instruments. New Haven: Isaac Doolittle (1721-1800); clocks and scientific instruments. Isaac Doolittle, Jr. (1759-1821); surveying instruments and clocks. Sibley & Marble (late 18th century); clocks and mathematical instruments. New Milford: Benjamin Platt (1757-1833); compasses and clocks. Newtown: Ziba Blakeslee (1768-1834); surveying instruments.