NamePeriodPlaceTypes of instrumentsBailey, Johnfl. 1778Fishkill, N. Y.Surveying; surgicalBailey, John, II1752-1823Hanover and Lynn, Mass.SurveyingBaily, Joel (practitioner)1732-1797West Bradford, Pa.Baldwin, Jedidiahc. 1777-1829Salem, Boston, and Northampton, Mass.; Hanover, N. H.SurveyingBanneker, Benjamin (practitioner)c. 1734-1806BaltimoreBenson, Johnfl. 1793-1797*OpticalBiddle, Owen (practitioner)1737-1799PhiladelphiaBiggs, Thomasfl. 1792-1795New York and PhiladelphiaSurveyingBlakslee, Ziba1768-1834Newtown, Conn.SurveyingBlundy, Charlesfl. 1753Charleston, S. C.Thermometric; watchesBowles, Thomas S.c. 1765-1821Portsmouth, N. H.SurveyingBreed, Aaron1791-1861BostonSurveyingBrokaw, Isaacfl. 1771Philadelphia*Bulmain & Denniesfl. 1799New YorkNauticalBurges, Bartholomewfl. 1789BostonScientificBurnap, Daniel1759-1838East Windsor and Coventry, Conn.Surveying; clocksCaritat, H.fl. 1799New YorkAstronomicalChandlee, Benjamin, Jr.1723-1791Nottingham, Md.Surveying; clocksChandlee & Bros.fl. 1790-1791Nottingham, Md.Clocks; surveyingChandlee, Ellis1755-1816Nottingham, Md.Surveying; clocksChandlee, Ellis & Bros.fl. 1791-1797Nottingham, Md.Clocks; surveyingChandlee, Goldsmithc. 1751-1821Winchester, Va.Surveying; astronomical; clocksChandlee, Isaac1760-1813Nottingham, Md.Surveying; clocksClark, Robertfl. 1785Charleston, S.C.Nautical; surveying opticalClough, Jere18th centuryBostonSurveyingCondy, Benjaminfl. 1756-1798, d. 1798PhiladelphiaMathematical; sand glassesCrow, Georgec. 1726-1772Wilmington, Del.Surveying; clocksDabney, John, Jr.fl. 1739BostonMathematicalDakin, Jonathanfl. 1745BostonMathematical; balancesDavenport, William1778-1829PhiladelphiaMathematical; surveyingDean, William(?-1797)PhiladelphiaSurveying; nauticalDevacht, Joseph and Francoisfl. 1792Gallipolis, OhioWatches; compasses; sundialsDonegan (or Denegan), Johnfl. 1787New YorkGlass; philosophicalDonegany, John (see Donegan)Doolittle, Enos clocks1751-1806Hartford, Conn.Surveying; nautical;Doolittle, Isaac1721-1800New Haven, Conn.Clocks; scientificDoolittle, Isaac, Jr.1759-1821New Haven, Conn.Surveying; clocksDupee, Johnfl. after 1761BostonSurveyingEllicott, Andrew (also practitioner)1754-1820BaltimoreSurveying; astronomicalEmery, Samuel1787-1882Salem, Mass.MathematicalEvans, Georgefl. 1796; d. 1798PhiladelphiaMathematicalFairman, Gideon (See Hooker and Fairman)1774-1827Newburyport, Mass.MathematicalFisher, Martinfl. 1790PhiladelphiaGlassFolger, Peter (practitioner?)1617-1690NantucketFolger, Walter, Jr. surveying1765-1849NantucketAstronomical; SurveyingFord, Georgefl. late 18th century to 1842Lancaster, Pa.Surveying; nauticalFord, George, IIfl. 1842Lancaster, Pa.Surveying; nauticalFosbrook, W.fl. 1786 or earlierNew YorkSurgical; dentalGatty, Josephfl. 1794New York and PhiladelphiaGlass; philosophicalGilman, Benjamin C.1763-1835Exeter, N.H.Mathematical; clocksGilmur, Bryanfl. end of 18th centuryPhiladelphiaMathematical; clocksGodfrey, Thomas1704-1749PhiladelphiaImproved reflecting backstaffGould, Johnfl. 1794PhiladelphiaNautical; surgical; opticalGrainger, Samuel (practitioner)fl. 1719BostonGreenleaf, Stephen1704-1795BostonMathematicalGreenough, Thomas1710-1785BostonMathematical; surveying; nautical; astronomicalGreenough, Williamfl. 1785BostonSurveyingGreenwood, Isaac, Sr. (practitioner)fl. 1726BostonSurveyingGreenwood, Isaac, Jr.1730-1803BostonMathematicalGrew, Theophilus (practitioner)fl. 1753PhiladelphiaHagger, Benjamin Kingc. 1769-1834Boston and BaltimoreMathematical; surveyingHagger, William Guysec. 1744-1830?Newport, R.I.NauticalHalsie, James, I (practitioner)fl. 1674BostonHalsy, James, II1695-1767BostonMathematical; surveyingHalsy, Johnfl. 1700BostonMathematicalHalsy, Josephfl. 1697-1762BostonSurveying; nauticalHam, Jamesfl. 1754-1764New York and PhiladelphiaMathematicalHam, James, Jr.fl. 1780PhiladelphiaMathematicalHamlin, William1772-1869Providence, R. I.Mathematical; nautical; astronomicalHanks, Benjamin1755-1824Mansfield and Litchfield, Conn.SurveyingHanks, Trumanfl. 1808Mansfield and Litchfield, Conn.SurveyingHarland, Thomas1735-1807Norwich, Conn.Surveying; clocksHeisely, Frederick A.1759-1839Frederick, Md.; Lancaster, Harrisburg, and Pittsburgh, Pa.Mathematical; surveying; clocksHeisely, George1789-1880Harrisburg, Pa.Clocks; mathematicalHinton, Williamfl. 1772New YorkMathematicalHoff, George1740-1816Lancaster, Pa.Clocks; surveyingHolcomb, Amasa (also practitioner)1787-1875Southwick, Mass.Surveying; astronomicalHooker & Fairman (William Hooker and Gideon Fairman)before 1810Newburyport, Mass.MathematicalHoughton, Rowlandc. 1678-1744BostonSurveyingHuntington, Gurdon1763-1804Windham, Conn., and Walpole, N.H.Surveying and other; clocksJacks, Jamesfl. 1780'sCharleston, S.C. surveyingMathematical;Jayne, Johnlate 18th centurySalem, Mass.MathematicalKennard, John1782-1861Newmarket, N.H.Surveying; clocksKetterer, Alloysiusfl. 1789PhiladelphiaGlassKing & Hagger (Benjamin King and William Guyse Hagger)1759 or 1760 until early 1760'sNewport, R.I.Mathematical; nauticalKing, Benjamin1707-1786Newport, R.I.Mathematical; nauticalKing, Benjamin1740-1804Salem, Mass.NauticalKing, Daniel1704-1790Salem, Mass.MathematicalKing, Samuel1748-1819Newport, R.I.MathematicalLamb, A. & Son1780'sNew YorkMathematicalLamb, Anthony1703-1784England; Virginia; Philadelphia; New York; Hunter's Key, N.Y.Mathematical; surveying; nauticalLamb, John1735-1800New YorkMathematicalMendenhall, Thomasfl. 1775Lancaster, Pa.Mathematical; clocksMiller, Aaronfl. 1748-1771Elizabethtown, N.J.Surveying; clocks; compassesMorris, M.fl. 1785New YorkProtractorsNewell, Andrew1749-1798BostonMathematical; compassesNewell, Josephfl. 1800-1813BostonSurveyingPease, Paulfl. 1750Probably Rhode IslandQuadrantPlatt, Augustus1793-1886Columbus, OhioMathematical; surveyingPlatt, Benjamin1757-1833Danbury, Litchfield, and New Milford, Conn.; Lanesboro, Mass.; Columbus, OhioCompasses; surveying; clocksPope, Joseph1750-1826BostonScientific; clocksPotter, Johnfl. 1746-1818Brookfield, Mass.SurveyingPotts, W. L.late 18th centuryBucks County, Pa.SurveyingPrince, John (practitioner)1751-1836Salem, Mass.ScientificPrince, Nathan (practitioner)fl. 1743BostonPryor, Thomasfl. 1778PhiladelphiaMathematicalRevere, Paul1735-1818BostonGunneryRittenhouse, Benjamin1740-c.1820PhiladelphiaAstronomical; surveyingRittenhouse, David (practitioner)1732-1796Philadelphia and Norriton, Pa.Astronomical; surveyingRittenhouse & Evansfl. 1770'sPhiladelphiaSurveyingSibley & Marble (Clark Sibley and Simeon Marble)late 18th centuryNew Haven, Conn.Mathematical; clocks; watchesSmith, Cordialfl. 1775ConnecticutSurveyingSommer, widow Balthaserfl. 1753New YorkOpticalSower, Christopherc. 1724-1740Germantown and Philadelphia, Pa.Mathematical; clocksStiles & Baldwin (Jedidiah Baldwin)fl. 1791Northampton, Mass.SurveyingStiles & Storrs (Nathan Storrs and Jedidiah Baldwin)fl. 1792Northampton, Mass.SurveyingTaws, Charlesfl. 1795PhiladelphiaMathematicalThacher, Charles18th centuryProbably BostonSurveyingThaxter, Samuel1769-1842BostonNautical; mathematical surveyingVoight, Henry1738-1814PhiladelphiaAstronomical; clocks; watchesWall, George, Jr.fl. 1788Bucks County, Pa.SurveyingWalpole, Charlesfl. 1746New YorkMathematicalWarren, Benjaminfl. 1740-1790Plymouth, Mass.Surveying; nauticalWhite, Peregrine1747-1834Woodstock, Conn.Surveying; clocksWhitney, Johnfl. 1801PhiladelphiaMathematical; opticalWhitney, Thomasfl. 1798-1823PhiladelphiaMathematical; optical; surveyingWilliams, William1737 or 1738-1792BostonMathematical; nauticalWillis, Arthur (practitioner)fl. 1674Possibly MassachusettsWilson, James1763-1855Bradford, Vt.GlobesWistar, Richardfl. 1752Wistarburg, N.J.GlassWitt, Christopher (practitioner)fl. 1710-1765Germantown, Pa.Mathematical; clocksWood, Johnfl. 1790PhiladelphiaCompassesYoule, James1740-1786New YorkSurgicalYoule, Johnfl. 1786New YorkSurgical
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