Brokaw, Isaac fl. 1771 Philadelphia *
Bulmain & Dennies fl. 1799 New York Nautical
Burges, Bartholomew fl. 1789 Boston Scientific
Burnap, Daniel 1759-1838 East Windsor and Surveying; clocks
Coventry, Conn.
Caritat, H. fl. 1799 New York Astronomical
Chandlee, Benjamin, 1723-1791 Nottingham, Md. Surveying; clocks
Jr.
Chandlee & Bros. fl. 1790-1791 Nottingham, Md. Clocks; surveying
Chandlee, Ellis 1755-1816 Nottingham, Md. Surveying; clocks
Chandlee, Ellis & fl. 1791-1797 Nottingham, Md. Clocks; surveying
Bros.
Chandlee, Goldsmith c. 1751-1821 Winchester, Va. Surveying;
astronomical;
clocks
Chandlee, Isaac 1760-1813 Nottingham, Md. Surveying; clocks
Clark, Robert fl. 1785 Charleston, S.C. Nautical; surveying
optical
Clough, Jere 18th century Boston Surveying
Condy, Benjamin fl. 1756-1798, Philadelphia Mathematical; sand
d. 1798 glasses
Crow, George c. 1726-1772 Wilmington, Del. Surveying; clocks
Dabney, John, Jr. fl. 1739 Boston Mathematical
Dakin, Jonathan fl. 1745 Boston Mathematical;
balances
Davenport, William 1778-1829 Philadelphia Mathematical;
surveying
Dean, William (?-1797) Philadelphia Surveying; nautical
Devacht, Joseph and fl. 1792 Gallipolis, Ohio Watches; compasses;
Francois sundials
Donegan (or fl. 1787 New York Glass;
Denegan), John philosophical
Donegany, John (see
Donegan)
Doolittle, Enos 1751-1806 Hartford, Conn. Surveying;
clocks nautical;
Doolittle, Isaac 1721-1800 New Haven, Conn. Clocks; scientific
Doolittle, Isaac, 1759-1821 New Haven, Conn. Surveying; clocks
Jr.
Dupee, John fl. after 1761 Boston Surveying
Ellicott, Andrew 1754-1820 Baltimore Surveying;
(also practitioner) astronomical
Emery, Samuel 1787-1882 Salem, Mass. Mathematical
Evans, George fl. 1796; d. Philadelphia Mathematical
1798
Fairman, Gideon 1774-1827 Newburyport, Mathematical
(See Hooker and Mass.
Fairman)
Fisher, Martin fl. 1790 Philadelphia Glass
Folger, Peter 1617-1690 Nantucket
(practitioner?)
Folger, Walter, Jr. 1765-1849 Nantucket Astronomical;
surveying
Ford, George fl. late 18th Lancaster, Pa. Surveying; nautical
century to
1842
Ford, George, II fl. 1842 Lancaster, Pa. Surveying; nautical
Fosbrook, W. fl. 1786 or New York Surgical; dental
earlier
Gatty, Joseph fl. 1794 New York and Glass;
Philadelphia philosophical
Gilman, Benjamin C. 1763-1835 Exeter, N.H. Mathematical;
clocks
Gilmur, Bryan fl. end of Philadelphia Mathematical;
18th century clocks
Godfrey, Thomas 1704-1749 Philadelphia Improved reflecting
backstaff
Gould, John fl. 1794 Philadelphia Nautical; surgical;
optical
Grainger, Samuel fl. 1719 Boston
(practitioner)
Greenleaf, Stephen 1704-1795 Boston Mathematical
Greenough, Thomas 1710-1785 Boston Mathematical;
surveying;
nautical;
astronomical
Greenough, William fl. 1785 Boston Surveying
Greenwood, Isaac, fl. 1726 Boston Surveying
Sr. (practitioner)
Greenwood, Isaac, 1730-1803 Boston Mathematical
Jr.
Grew, Theophilus fl. 1753 Philadelphia
(practitioner)
Hagger, Benjamin c. 1769-1834 Boston and Mathematical;
King Baltimore surveying
Hagger, William c. 1744-1830? Newport, R.I. Nautical
Guyse
Halsie, James, I fl. 1674 Boston
(practitioner)
Halsy, James, II 1695-1767 Boston Mathematical;
surveying
Halsy, John fl. 1700 Boston Mathematical
Halsy, Joseph fl. 1697-1762 Boston Surveying; nautical
Ham, James fl. 1754-1764 New York and Mathematical
Philadelphia
Ham, James, Jr. fl. 1780 Philadelphia Mathematical
Hamlin, William 1772-1869 Providence, R. I. Mathematical;
nautical;
astronomical
Hanks, Benjamin 1755-1824 Mansfield and Surveying
Litchfield, Conn.
Hanks, Truman fl. 1808 Mansfield and Surveying
Litchfield, Conn.
Harland, Thomas 1735-1807 Norwich, Conn. Surveying; clocks
Heisely, Frederick 1759-1839 Frederick, Md.; Mathematical;
A. Lancaster, surveying; clocks
Harrisburg, and
Pittsburgh, Pa.
Heisely, George 1789-1880 Harrisburg, Pa. Clocks;
mathematical
Hinton, William fl. 1772 New York Mathematical
Hoff, George 1740-1816 Lancaster, Pa. Clocks; surveying
Holcomb, Amasa 1787-1875 Southwick, Mass. Surveying;
(also practitioner) astronomical
Hooker & Fairman before 1810 Newburyport, Mathematical
(William Hooker and Mass.
Gideon Fairman)
Houghton, Rowland c. 1678-1744 Boston Surveying
Huntington, Gurdon 1763-1804 Windham, Conn., Surveying and
and Walpole, N.H. other; clocks
Jacks, James fl. 1780's Charleston, S.C. Mathematical;
surveying
Jayne, John late 18th Salem, Mass. Mathematical
century
Kennard, John 1782-1861 Newmarket, N.H. Surveying; clocks
Ketterer, Alloysius fl. 1789 Philadelphia Glass
King & Hagger 1759 or 1760 Newport, R.I. Mathematical;
(Benjamin King and until early nautical
William Guyse 1760's
Hagger)
King, Benjamin 1707-1786 Newport, R.I. Mathematical;
nautical
King, Benjamin 1740-1804 Salem, Mass. Nautical
King, Daniel 1704-1790 Salem, Mass. Mathematical
King, Samuel 1748-1819 Newport, R.I. Mathematical
Lamb, A. & Son 1780's New York Mathematical
Lamb, Anthony 1703-1784 England; Mathematical;
Virginia; surveying; nautical
Philadelphia; New
York; Hunter's
Key, N.Y.
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
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.
Norwich: Thomas Harland (1735-1807); surveying instruments and
clocks.
Windham: Gurdon Huntington (1763-1804); clocks and surveying
and other instruments.
Woodstock: Peregrine White (1747-1834); surveying instruments and
clocks.
----: Smith, Cordial (fl. 1775); surveying instruments.
DELAWARE
Wilmington: George Crow (c. 1726-1772); surveying instruments
and clocks.
MARYLAND
Baltimore: Benjamin Banneker (c. 1734-1806), practitioner.
Andrew Ellicott (1754-1820), practitioner; surveying
and astronomical instruments.
Benjamin K. Hagger (c. 1769-1834); mathematical and
surveying instruments.
Frederick: Frederick A. Heisely (1759-1839); clocks and
mathematical instruments.
Nottingham: Benjamin Chandlee, Jr. (1723-1791); clocks and
surveying instruments.
Chandlee & Bros. (fl. 1790-1791); clocks and surveying
instruments.
Ellis Chandlee (1755-1816); surveying instruments and
clocks.
Ellis Chandlee & Bros. (fl. 1791-1797); clocks and
surveying instruments.
Isaac Chandlee (1760-1813); surveying instruments and
clocks.
MASSACHUSETTS
Boston: Jedidiah Baldwin (c. 1777-1829); surveying instruments.
Aaron Breed (1791-1861); surveying instruments.
Bartholomew Burges (fl. 1789); scientific instruments.
Jere Clough (18th century); surveying instruments.
John Dabney, Jr. (fl. 1739); mathematical instruments.
Jonathan Dakin (fl. 1745); mathematical instruments
and balances.
John Dupee (fl. after 1761); surveying instruments.
Samuel Grainger (fl. 1719), practitioner.
Stephen Greenleaf (1704-1795); mathematical instruments.
Thomas Greenough (1710-1785); mathematical, surveying,
astronomical, and nautical instruments.
William Greenough (fl. 1785); surveying instruments.
Isaac Greenwood, Sr. (c.1725-1750), practitioner.
Isaac Greenwood, Jr. (1730-1803); mathematical
instruments.
Benjamin K. Hagger (c. 1769-1834); mathematical and
surveying instruments.
James Halsie I (fl. 1674), practitioner.
James Halsy II (1695-1767); mathematical and surveying
instruments.
John Halsy (fl. 1700); mathematical instruments.
Joseph Halsy (fl. 1697-1762); surveying instruments.
Rowland Houghton (1678-1744); surveying instruments.
Andrew Newell (1749-1798); surveying instruments.
Joseph Newell (fl. 1800-1813); surveying instruments.
Joseph Pope (1750-1826); scientific instruments and
clocks.
Nathan Prince (fl. 1743), practitioner; scientific
instruments.
Paul Revere (1735-1818); gunnery instruments.
Charles Thacher (18th century); surveying instruments.
Samuel Thaxter (1769-1842); surveying, nautical, and
mathematical instruments.
William Williams (1737/8-1792); mathematical and
nautical instruments.
Brookfield: John Potter (1746-1818); surveying instruments.
Hanover: John Bailey II (1752-1823); surveying instruments.
Lanesboro: Benjamin Platt (1757-1833); surveying instruments,
clocks, and compasses.
Lynn: John Bailey II (1752-1823); surveying instruments.
Nantucket: Peter Folger (1617-1690), practitioner(?).
Walter Folger (1765-1849), practitioner; clocks and
astronomical instruments.
Newburyport: Gideon Fairman (1774-1827); mathematical instruments.
Hooker & Fairman (before 1810); mathematical
instruments.
Northampton: Jedidiah Baldwin (c.1777-1829); surveying instruments.
Stiles & Baldwin (fl.1791); surveying instruments.
Stiles & Storrs (fl.1792); surveying instruments.
Plymouth: Benjamin Warren (fl.1740-1790); surveying and nautical
instruments.
Salem: Jedidiah Baldwin (c.1777-1829); surveying instruments.
Samuel Emery (1787-1882); mathematical instruments.
John Jayne (late 18th century); mathematical
instruments.
Benjamin King (1740-1804); nautical instruments.
Daniel King (1704-1790); mathematical instruments.
John Prince (1751-1836), practitioner; scientific
instruments.
Southwick: Amasa Holcomb (1787-1875); surveying and mathematical
instruments.
NEW HAMPSHIRE
Exeter: Benjamin C. Gilman (1763-1835); mathematical
instruments and clocks.
Hanover: Jedidiah Baldwin (c.1777-1829); surveying instruments.
Newmarket: John Kennard (1782-1861); surveying instruments.
Portsmouth: Thomas S. Bowles (c.1765-1821); surveying instruments.
Walpole: Gurdon Huntington (1763-1804); clocks and surveying
and other instruments.
NEW JERSEY
Elizabeth: Aaron Miller (fl. 1748-1771); surveying instruments,
clocks, and compasses.
Wistarburg: Richard Wistar (fl. 1752); glass and thermometric
instruments.
NEW YORK
Fishkill: John Bailey (fl. 1778); surveying and surgical
instruments.
New York: Thomas Biggs (fl. 1792); surveying instruments.
Bulmain & Dennies (fl. 1799); nautical instruments.
H. Caritat (fl. 1799); astronomical prints.
John Donegan (fl. 1787); barometers, thermometers,
and philosophical instruments.
W. Fosbrook (fl. 1786); surgical and dental
instruments.
Joseph Gatty (fl. 1794); barometers, thermometers and
philosophical instruments.
James Ham (fl. 1754-1764); mathematical instruments.
William Hinton (fl. 1772); mathematical instruments.
A. Lamb & Son (fl. late 18th century); mathematical
instruments.
Anthony Lamb (1703-1784); mathematical instruments.
John Lamb (1735-1800); mathematical instruments.
M. Morris (fl. 1785); protractors.
Widow Balthaser Sommer (fl. 1753); optical instruments.
Charles Walpole (fl. 1746); mathematical instruments.
James Youle (1740-1786); surgical instruments.
John Youle (fl. 1786); surgical instruments.
OHIO
Columbus: Augustus Platt (1793-1886); mathematical instruments.
Benjamin Platt (1757-1833); surveying instruments and
clocks.
Gallipolis: Joseph (fl. 1792) and Francois Devacht; watches,
compasses, and sundials.
PENNSYLVANIA
Bucks County: W. L. Potts (late 18th century); surveying instruments.
George Wall, Jr. (fl. 1788); surveying instruments.
Germantown: Christopher Sower (c. 1724-1740); mathematical
instruments and clocks.
Christopher Witt (fl. 1710-1765); mathematical
instruments and clocks.
Harrisburg: Frederick A. Heisely (1759-1839); clocks and
mathematical instruments.
George Heisely (1789-1880); clocks and mathematical
instruments.
Lancaster: George Ford (late 18th century to 1842); surveying
and nautical instruments.
George Ford II (fl. 1842); surveying and nautical
instruments.
Frederick A. Heisely (1759-1839); clocks and
mathematical instruments.
George Hoff (1740-1816); clocks, surveying instruments.
Thomas Mendenhall (fl. 1775); mathematical instruments
and clocks.
Norristown: David Rittenhouse (1732-1796), practitioner;
astronomical and surveying instruments.
Philadelphia: Owen Biddle (1737-1799), practitioner.
Thomas Biggs (fl. 1792-1795); surveying instruments.
Isaac Brokaw (fl. 1771).
Benjamin Condy (fl. 1756, d. 1798); mathematical
instruments and sand glasses.
William Davenport (1778-1829); surveying and
mathematical instruments.
William Dean (?-1797); surveying and nautical
instruments.
George Evans (fl. 1796, d. 1798); mathematical
instruments.
Martin Fisher (fl. 1790); glass instruments.
Joseph Gatty (fl. 1794); barometers, thermometers,
and philosophical instruments.
Bryan Gilmur (end of 18th century); mathematical
instruments and clocks.
Thomas Godfrey (1704-1749); improved reflecting
backstaff.
John Gould (fl. 1794); nautical, surveying,
and optical instruments.
Theophilus Grew (fl. 1753), practitioner.
James Ham (fl. 1754-1764); mathematical instruments.
James Ham, Jr. (fl. 1780); mathematical instruments.
Alloysius Ketterer (fl. 1789); glass instruments.
Anthony Lamb (1703-1784); mathematical instruments.
Thomas Pryor (fl. 1778); mathematical instruments.
Benjamin Rittenhouse (1740-c.1820); surveying and
astronomical instruments.
David Rittenhouse (1732-1796), practitioner;
astronomical and surveying instruments.
Christopher Sower [Sauer] (c. 1724-1740); mathematical
instruments and clocks.
Charles Taws (fl. 1795); mathematical instruments.
Henry Voight (1738-1814); clocks, watches, and
astronomical instruments.
John Whitney (fl. 1801); mathematical and optical
instruments.
Thomas Whitney (fl. 1798-1823); mathematical and
optical instruments.
John Wood (fl. 1790); compasses.
Pittsburgh: Frederick A. Heisely (1759-1839); clocks and
mathematical instruments.
West Bradford: Joel Baily (1732-1797), practitioner.
RHODE ISLAND
Newport: William G. Hagger (c.1744-1830?); quadrants.
King & Hagger (1759/60); mathematical and nautical
instruments.
Benjamin King (1707-1786); mathematical and nautical
instruments.
Samuel King (1748-1819); mathematical instrument.
Paul Pease (fl. 1750); quadrants.
Providence: William Hamlin (1772-1869); mathematical,
astronomical, and nautical instruments.
SOUTH CAROLINA
Charleston: Charles Blundy (fl. 1753); thermometric instruments.
Robert Clark (fl. 1785); nautical, surveying, and
optical instruments.
James Jacks (fl. 1780's); mathematical and surveying
instruments.
VERMONT
Bradford: James Wilson (1763-1855); globes.
VIRGINIA
Winchester: Goldsmith Chandlee (c.1746-1821); surveying and
astronomical instruments and clocks.
Anthony Lamb (1703-1784); mathematical instruments.
TYPES OF INSTRUMENTS AND THEIR MAKERS
_(Categories based on specific designations noted in advertisements)_
ASTRONOMICAL
Caritat, H. (fl. 1799), New York.
Chandlee, Goldsmith (c.1746-1821), Winchester, Va.; also made surveying
instruments and clocks.
Ellicott, Andrew (1754-1820), Baltimore; also made surveying
instruments.
Folger, Walter, Jr. (1765-1849), Nantucket, Mass.; also made surveying
instruments.
Greenough, Thomas (1710-1785), Boston; also made mathematical,
surveying, and nautical instruments.
Hamlin, William (1772-1869), Providence, R.I.; also made mathematical
and nautical instruments.
Holcomb, Amasa (1787-1875), Southwick, Mass.; also made surveying
instruments.
Rittenhouse, Benjamin (1740-c.1820), Philadelphia; also made surveying
instruments.
Rittenhouse, David (1732-1796), Philadelphia and Norristown, Pa.; also
made surveying instruments.
Voight, Henry (1738-1814), Philadelphia; also made clocks and watches.
GLASS AND THERMOMETRIC
Blundy, Charles (fl. 1753), Charleston, S.C.; also made watches.
Donegan, Joseph (fl. 1787), New York and Philadelphia; also made
philosophical instruments.
Fisher, Martin (fl. 1790), Philadelphia.
Gatty, Joseph (fl. 1794), New York and Philadelphia; also made
philosophical instruments.
Ketterer, Alloysius (fl. 1789), Philadelphia.
Wistar, Richard (fl. 1752), Wistarburg, N.J.
HOROLOGICAL
Blundy, Charles (fl. 1753), Charleston, S.C.; also made thermometric
instruments.
Burnap, Daniel (1759-1838), East Windsor and Coventry, Conn.; also made
surveying instruments.
Chandlee, Benjamin (1723-1791), Nottingham, Md.; also made surveying
instruments.
Chandlee & Bros. (fl. 1790-1791), Nottingham, Md.; also made surveying
instruments.
Chandlee, Ellis (1755-1816), Nottingham, Md.; also made surveying
instruments.
Chandlee, Goldsmith (1751-1821), Winchester, Va.; also made astronomical
and surveying instruments.
Chandlee, Isaac (1760-1813), Nottingham, Md.; also made surveying
instruments.
Crow, George (c.1726-1772), Philadelphia; also made surveying
instruments.
DeVacht, Joseph and Francois (fl. 1792), Gallipolis, Ohio; also made
compasses and sundials.
Doolittle, Enos (1751-1806), Hartford, Conn.; also made surveying and
nautical instruments.
Doolittle, Isaac (1721-1800), New Haven, Conn.; also made scientific
instruments.
Doolittle, Isaac Jr. (1759-1821), New Haven, Conn.; also made surveying
instruments.
Gilman, Benjamin C. (1763-1835), Exeter, N.H.; also made mathematical
instruments.
Gilmur, Bryan (fl. end of 18th century), Philadelphia; also made
mathematical instruments.
Harland, Thomas (1735-1807), Norwich, Conn.; also made surveying
instruments.
Heisely, Frederick A. (1759-1839), Frederick, Md.; also made
mathematical and surveying instruments.
Heisely, George (1789-1880), Harrisburg, Pa.; also made mathematical
instruments.
Hoff, George (1740-1816), Lancaster, Pa.; also made surveying
instruments.
Huntington, Gurdon (1763-1804), Windham, Conn., and Walpole, N.H.; also
made surveying and other instruments.
Kennard, John (1782-1861), Newmarket, N.H.; also made surveying
instruments.
Mendenhall, Thomas (fl. 1775), Lancaster, Pa.; also made mathematical
instruments.
Miller, Aaron (fl. 1748-1771), Elizabethtown, N.J.; also made compasses
and surveying instruments.
Platt, Benjamin (1757-1833), Danbury, Litchfield, and New Milford,
Conn.; Lanesboro, Mass.; Columbus, Ohio; also made compasses and
surveying instruments.
Pope, Joseph (1750-1826), Boston; also made scientific instruments.
Sibley & Marble (Clark Sibley and Simeon Marble) (late 18th century),
New Haven, Conn.; also made mathematical instruments.
Sower, Christopher (c. 1724-1740), Germantown and Philadelphia, Pa.;
also made mathematical instruments.
Voigt, Henry (1738-1814), Philadelphia; also made astronomical
instruments.
White, Peregrine (1747-1834), Woodstock, Conn.; also made surveying
instruments.
Witt, Christopher (practitioner) (fl. 1710-1765), Germantown, Pa.; also
made mathematical instruments.
MATHEMATICAL (GENERAL)
Condy, Benjamin (fl. 1756-1792, d. 1798), Philadelphia.
Dabney, John, Jr. (fl. 1739), Boston.
Dakin, Jonathan (fl. 1745), Boston; also made balances.
Davenport, William (fl. 1800-1820), Philadelphia; also made surveying
instruments.
Doolittle, Isaac (1721-1800), New Haven, Conn.; also made clocks.
Emery, Samuel (late 18th century), Salem, Mass.
Evans, George (fl. 1796, d. 1798), Philadelphia.
Fairman, Gideon (1774-1827), Newburyport, Mass.
Gilman, Benjamin C. (1763-1835), Exeter, N.H.; also made clocks.
Gilmur, Bryan (end of 18th century), Philadelphia; also made clocks.
Greenleaf, Stephen (fl. 1745), Boston.
Greenough, Thomas (1710-1785), Boston; also made surveying,
astronomical, and nautical instruments.
Greenwood, Isaac, Jr. (1730-1803), Boston.
Hagger, Benjamin K. (c.1769-1834), Boston and Baltimore; also made
surveying instruments.
Halsy, James, II (1695-1767), Boston; also made surveying instruments.
Halsy, John (fl. 1700), Boston.
Ham, James (fl. 1754-1764), New York and Philadelphia.
Ham, James, Jr. (fl. 1780), Philadelphia.
Hamlin, William (1772-1869), Providence, R.I.; also made nautical and
astronomical instruments.