Important note: Most of these instruments are not in the Adler collection (which you can find more information about here). We know nothing about them beyond the information returned by searching this database. You may be able to learn more by contacting the institutions in the "Instruments" column, or by consulting the "References" listed.
Your search for signatures starting with O yielded 128 entries. Displaying entries 1–128.See an error? Suggest a correction!
| Signature | Maker Info | Instruments | Comments | Location | References |
| O.H.P. | see Ottheinrich Herzog von der Pfalz. | RSW. | |||
| O.H.P.C. | Germany, | marked on the back of a horary quadrant by Jacob Rabus at NUR, dedicated to Ottheinrich von der Pfalz, 1556. | Zinner 1. | ||
| O.H.S. | O.h.S.; see S.h.O. | Price 3. | |||
| O.K.S.P. | 1842, NIM | Traverse Board, 1842 = OMM. | RSW. | ||
| O.L. | Sweden, 1737, MIM | Gunner's Scale, 1737 = SKO. | Price 2. | ||
| O.R.B. | fl.1567-1612, | mark on sand glasses; Vivielle thought they were made by Hans Ducher of Nürnberg. | Vivielle 1. | ||
| OAKES, JOHN | USA, 1818-1910, MIM NIM PHIM SIM | Surveyor's Compass = P.C. | in the New York City Directories from 1848 to 1896 as a mathematical, nautical, and philosophical instrument maker; sometimes spelled "Oaks." | New York, N.Y. | Smart 1; USNM. |
| OAKESHOTT, WILLIAM | England, fl.1844-45, PHIM | barometer and thermometer maker. | 29 St. John Street, Clerkenwell, London. | Goodison 1. | |
| OAKLEY, JOHN | England, c.1757, | apprenticed to John Morgan 2 in the Joiners' Company on May 3, 1757. | Crawforth 7. | ||
| OAKLEY, JOSEPH | England, fl.1767-77, OIM | Upper Priory (1767); 79 Bull Street opposite the Saracen's Head (1770-77); both in Birmingham. | Bryden 9. | ||
| OATES, JOHN | England, PHIM | Angle Barometer = X. | Pump, near Halifax. | Goodison 1. | |
| OBERHAUSER, G., ET E. HARTNACK | France, fl.1847-56, MIM OIM | Microscopes = Soth. 9/20/83. D.(1984). | Georges Oberhauser and his nephew, Edmund Hartnack. | Place Dauphine, 21, Paris. | Coffeen F; RSW. |
| OBERHAUSER, GEORGES | Germany; France, 1798-1868, MIM OIM | Microscopes = HAR, Christie 5/26/76. | breveté; made jewel lenses; worked with Henri-Prudence Gambey, 1815; retired in 1856; "opticien." | Germany (1798-1815); 19 Place Dauphine, Paris. | Pipping 1; Ambler; Dewhirst; Clay and Court; RSW. |
| OBERHAUSER, JOHANN | Germany, fl.1759-66, MIM SIM | Theodolite, 1759 = MUN; Mathematical Instrument Set, 1766 = DEU. | Schwaz in Tyrol. | Zinner 1; Price 2. | |
| OBERKAN, JOHAN HEINRICH | Switzland, 1690, MIM | Astrolabe, 1690 = Landesmuseum in Grand Hotel, Nancy. | ICA-3202. | Zurich. | Price 1 and 2; ICA 2. |
| OCHS, HANS | MIM | Diptych Sundial, gilt-bass = LIE. | Zinner 1; Michel 3. | ||
| ODELEM, ANTOR | Germany, 1661-1740, MIM SIM | Theodolites = HAK, Braunschweig Stadt Museum; Astronomical Rings = DRE, P. & S. 3/20/96, Evans Coll.; Table Sundial, 1715 = LUN; Sundials = NOR, Triebold Coll. | P. and S. and Evans Coll. astronomical rings may be one instrument. | Braunschweig. | Zinner 1; Michel 3; Gunther 2; Evans 1; RSW. |
| ODELL, JOHN | England; USA, fl.1800-22, MIM NIM OIM SIM | worked for Spencer, Browning and Rust 1 for 20 years; came to USA in 1819; "J. Odell, Maker 1805" is found under the mirror of a Spencer, Browning and Rust octant at the Franklin Institute. | London (1800-19); USA (1819-22). | D.J. Warner 10. | |
| ODELSTIERNA, CARL | Sweden, 1753-95, OIM | fl.1780-95; business continued by Peter Helleström. | Stockholm. | Pipping 1. | |
| ODENDAL, WILHELM | Germany, 1651, PHIM | Money Balance, 1651 = DRE. | Cologne. | RSW. | |
| ODENDOLL, M. BERND | see M. Berndt Odental. | RSW. | |||
| ODENKIRCHEN, P., AND S. BOSCH | Holland, PHIM | Wheel Barometer = Hawden-Satter House, Nantucket, Mass. | RSW. | ||
| ODENTAL, BERNDT AND JACOB HEUSCHER | Germany, 1699, PHIM | Balance, 1699 = American Numismatic Society, New York, N.Y. | RSW. | ||
| ODENTAL, M. BERNDT | Germany, 1651, PHIM | Money Balance, 1651 = DRE. | also spelled "Odendoll." | Cologne. | RSW. |
| ODIORNE, JOTHAM | USA, c.1800, SIM | Graphometer = D.(1996). | may be owner. | Gorham, Maine or New Hampshire. | Coffeen 55. |
| ODOMALCOT | see Odon van Maecote. | RSW. | |||
| OEHLSCHLAGER, ADAM | Denmark, 1599-1671, | mathematicien; designed the Gottorp globe which was made by Busch; see Busch and Oehlschlager. | Gottorp. | H.C. King 2; Michel 3; Zinner 1. | |
| OERI | Switzerland, c.1850, MIM SIM | Surveyor's Compass = Western Reserve Historical Society, Ohio. | Zurich. | USNM. | |
| OERLE, FRANCOIS VAN | Holland, 1660, MIM | Pocket Sundial, 1660 = AMST. | "François van Oerle Fec A Bolduc ad Poli 52 Grade voor Cosyn Ambrosius Pool an 1660 November 8." | Den Bosch. | Mörzer Bruyns 1 and 2. |
| OERTLING | Germany, 1758, NIM | Sextant, 1758 = Soth. 5/19/60. | Berlin. | RSW. | |
| OERTLING, JOHANN AUGUST DANIEL | Germany, 1803-66, MIM NIM OIM SIM | Dividing Engine = DEU; Sextant, No. 1859 = D.(1989). | apprenticed to Karl Philipp Heinrich Pistor c.1819; started his own business in 1826 or 1827; first to build electric dividing engine; brother of Ludwig Oertling. | Berlin. | Pipping 1; Poggendorff; G.L'E. Turner 24; J.A. Bennett 2; Weil and Baden; Coffeen 27. |
| OERTLING, LUDWIG | Germany; England, 1818-93, PHIM | Laboratory Balances = KEN, Christie-SK 7/10/80. | apprenticed to his brother, Johann August Daniel Oertling, in Berlin; by 1847 he was in business in London; the firm is still going; specialized in precision balances; showed at the Great Exhibition, London, 1851; worked for R.B. Bate; he was in partnership with Edward Wilds Ladd as Ladd and Oertling 1860-70. | Berlin; 13 Store Street, Bedford Square, (1847-); 27 Moorgate Street (-1874); Turnmill Street near Farrington Street Station (1874-); all in London except for Berlin. | G.L'E. Turner 24; Chaldecott 3; RGO; Coffeen 27; McConnell 4; RSW. |
| OGDEN, F.B., AND ERICSSON | England, c.1837, | patented sea sounding apparatus in 1837. | London. | USNM. | |
| OGG | Scotland, fl.1844-46, NIM | see Ogg and M'Millan; also a watch and clockmaker. | 53 Marischall Street (1844); 30 Regent Quay (1845-46); beth in Aberdeen. | Bryden 3. | |
| OGG AND M'MILLAN | Scotland, fl.1844-46, NIM | also made clocks and watches; Ogg and William M'Millan. | 53 Marischall Street (1844); 30 Regent Quay (1845-46); both in Aberdeen. | Bryden 3. | |
| OGILVIE, ROBERT A. | England, c.1845, PHIM | barometer and thermometer maker. | 19 Upper Wharton Street, London. | Goodison 1. | |
| OHREN, MAGNUS | England, NIM | Mariner's Compass = NOR. | London. | RSW. | |
| OKESHOTT, ROBERT | England, c.1664, MIM | apprenticed to Ralph Greatorex of the Clockmakers' Company on June 7, 1664. | J. Brown 3. | ||
| OLDFIELD, HENRY | England, 1821, | apprenticed to William George Cook; free in the Masons' Company, March 29, 1821; listed as a victualler. | Crawforth 7. | ||
| OLEARIUS | see Oehlschläger. | Zinner 1. | |||
| OLING, LUCAS | Holland, 1564, | listed as a maker in a 1824 catalogue of books and instruments. | Leeuwarden. | Rooseboom 1. | |
| OLISIPONE | Spain, 1590, MIM | Sundial with compass, 1590 = Soth. 11/17/38. | "Olisipone elaborat A.R.D." | RSW. | |
| OLIVA, BONAVENTURA | Italy, c.1782, | invented philosophical instruments. | Mantua. | Offenbacher 22(1970). | |
| OLIVE, MICHAEL | England, fl.1849-56, MIM NIM | chronometer, watch and clock maker. | Church Street, 26 Arwenack Street, Falmouth. | H.M. Brown. | |
| OLIVER | England, 1892, | patented a meantime sundial in 1892. | RSW. | ||
| OLIVER, JOHN | England, 1616-1701, MIM | Window Sundial, glass, 1664 = ex-Rectory, North-hill, Bedfordshire. | may have made the window sundial for the Weavers' Company London, c.1669. | Eagle and Child, Ludgate Hill; Sign of the Ship, Great Old Bailey; both in London. | Gatty; Taylor 1(186); Daniels. |
| OLLAND, H. | Holland, 1825-1901, NIM PHIM | Pelorus = AMST. | Utrect. | Mörzer Bruyns 1; G.L'E. Turner 24. | |
| OLLER | an elaborate script and much wear caused Engelmann to make this misreading of Coenraad Metz, on ADL-M154. | Zinner 1; Engelmann 1; Rooseboom 1; ADL; RSW. | |||
| OLLER, ANTON HENRIK | Sweden, 1816-89, PHIM | made physical apparatus, 1857 on. | Stockholm. | Pipping 1. | |
| OLLIVIER | France, c.1770, | brother-in-law of Passemant; took over his workshop on Passemant's death; employed one of Passemant's workers, Nicollet. | Paris. | Daumas 1. | |
| OLSCHLAGER | see Oelschlager. | RSW. | |||
| OLSEN, CHRISTIAN D. | Norway?, 1824, NIM | Hadley's Quadrant, 1824 = OMM. | RSW. | ||
| OLSEN, G.T. | England, c.1830, NIM | Octant = Melun 4/24/83. | O.J. Olsen? | Grimsby. | RSW. |
| OLSEN, O.J. | England, 19th Century, NIM | Sextant = K. & C. 6/21/75. | G.T. Olsen? | RSW. | |
| OLSEN, T. | England, NIM | Octant, ebony = Christie 12/8/76. | Grimsby. | RSW. | |
| OLSSON | Sweden, MIM | Drawing Instrument Set = GMM. | Goteborg. | RSW. | |
| ONDERDEWIJNGAART CANZIUS, JACOB HENDRIK | Holland, fl.1771-1838, MIM OIM PHIM SIM | Circumferentors = D., Soth. 11/1687; Telescope = Frisian Maritime Museum, Sneek; Microscope, Dellebarre-type, 1806 = KEN; Air Pump = UTR; Bathometer = APS. | designed and manufactured scientific instruments; he had the first factory in Holland for this purpose, 1797; the microscope in the KEN is also marked "A. Dellebarre." | Delft. | Rooseboom 1; Brieux 2; Crommelin 1; Multhauf 1; Daumas 1; Clay and Court; Nachet; Mörzer Bruyns 2; USNM; RSW. |
| ONION, THOMAS | England, fl.1767-1801, MIM | rule maker; he worked in both boxwood and ivory. | Brickhill Lane (1767); Lancaster Street (1787); Great Hampton Street (1797-1801); all in Wolverhampton. | Bryden 9. | |
| OOSTERWIJK, SEVERIJN ADAMSON | Holland, fl.1658-85, MIM OIM | clockmaker; made microscopes ? | The Hague. | Rooseboom 1. | |
| OOTHOUT, JONAS VOLKAT | USA, 1814-60, MIM SIM | in partnership with Andrew Meneely from 1836 to 1838 at which time Oothout retired. | West Troy, N.Y. | Smart 1; RSW. | |
| OPP, C.H. | Germany, MIM | Pedometer = Evans Coll. | Berlin. | Evans 1. | |
| OPPELT, I.B. | Germany, fl.1785-1800, OIM | Microscopes = DEU (2), LEY. | the microscopes are dated 1785 and 1800. | Anspach. | Daumas 1. |
| OPPEN, J.F.B. | Denmark?, 1795, MIM | Compasses, 1795 = ROS-6886. | ROS Cat.; RSW. | ||
| OPPIN, CH | see Choppin. | Nachet. | |||
| ORAM, E. | USA, 1831, | received a patent for a terrestrial globe, Jan. 12, 1831. | New York, N.Y. | USNM. | |
| ORDYNO, GEORGE | England, c.1830, MIM OIM | Middle Pavement, Nottingham. | Taylor 2(1948). | ||
| OREZ, N. | fl.1633-48, MIM SIM | Horizontal Sundials, 1633 and 1648 = Evans Coll; Surveying Quadrant = Drouot 4/7/87. | the quadrant is marked "Factur", it has a protractor and a shadow square. | Evans 1; RSW.. | |
| ORIGONI, JOHN | England, fl.1830-47, PHIM | Wheel Barometer = X. | barometer maker; see Grassi, Bergna and Origoni; he was working alone by 1837. | 34 Dean Street, Newcastle (1837). | Taylor 2(1869) & (2195); Goodison 1. |
| ORME, CHARLES | England, 1688-1747, MIM PHIM | Angle Barometer, three tubes, 1741 = Goodison Coll.; Angle Barometers, two tubes = Gloucester Museum (1742), Soth. 2/24/85 (1741), Auction 1954 (1740 or 42); Angle Barometers, single tube = P.C. (1738), FIT, D.(1968)(1738); Angle Barometer, 1736 = Soth. 7/19/88; Angle Barometer, 1741 = Soth. 5/14/87 ; Rule = City of Leicester Museum. | author; may have invented the angle barometer. | Ashby-de-la Zouch, Leicestershire. | Goodison 1 & 2; Middleton 1; RSW. |
| ORREGGIO | England, PHIM | Wheel Barometer = X. | Nottingham. | Goodison 1. | |
| ORTALLY | France, PHIM | Wheel Barometer = D.(1973). | Rouen. | RSW. | |
| ORTALLY, JOSH. | England, c.1810, PHIM | Wheel Barometer = X. | see Joseph Ortelli and Co. | London. | Goodison 1. |
| ORTALY | England, PHIM | Wheel Barometer = X. | Goodison 1. | ||
| ORTELLI 1 | see Maggi and Ortelli. | Goodison 1. | |||
| ORTELLI 2 | England, PHIM | Wheel Barometer = X. | Goodison 1. | ||
| ORTELLI AND CO. 1 | England, c.1780, PHIM | Wheel Barometers = K. & C. 9/20/71, X; Stick Barometers = Christie 12/17/75, X. | the barometer sold at Christie is signed "Ortelli and Co. Macclesfield Warranted"; see P. Ortelli and Co. | Macclesfield. | Goodison 1; RSW. |
| ORTELLI AND CO. 2 | England, c.1800, PHIM | Wheel Barometer = X. | probably A. Ortelli 2 | Oxford. | Goodison 1. |
| ORTELLI AND CO. 3 | England, PHIM | Wheel Barometer = Soth. 7/21/87. | surely Ortelli and Co. 1 or 2. | Goodison 1. | |
| ORTELLI, A. (2) AND D., AND PRIMAVESI | England, fl.1846-48, PHIM | may be connected to Ortelli and Primavesi in London, 1848; made barometers and thermometers. | 114 High Street, Oxford. | Goodison 1. | |
| ORTELLI, A. 1 | England, c. 1800, PHIM | Barometer = D.(1972); Wheel Barometers = D.(1973), X(2); Stick Barometer = X. | D.(1973) signed "Ortelli Buckingham." | Buckingham. | Goodison 1; RSW. |
| ORTELLI, A. 2 | England, 1790-1846, PHIM | Wheel Barometers = X (3), Christie 12/17/75. | succeeded by A. (2) and D. Ortelli and Primavesi. | High Street, Oxford. | Goodison 1; RSW. |
| ORTELLI, A.M. | England, PHIM | Stick Barometer = Gloucester Museum. | Godalming. | Goodison 1. | |
| ORTELLI, D. | England, c.1850, PHIM | Stick Barometer = Soth.-Pul. 3/1/83. | see A. (2) and D. Ortelli and Primavesi; Defendent Ortelli? | Marlborough. | Goodison 1; RSW. |
| ORTELLI, DEFENDENT | England, fl.1852-60, PHIM | barometer and thermometer maker; succeeded Peter Ortelli; see Defendent and John Ortelli. | 49 Hatton Garden, London. | Goodison 1. | |
| ORTELLI, DEFENDENT AND JOHN | England, fl.1854-60, PHIM | barometer and thermometer makers. | 49 Hatton Garden, London. | Goodison 1. | |
| ORTELLI, JOHN | England, fl.1854-60, PHIM | see Defendent and John Ortelli. | 49 Hatton Garden, London. | Goodison 1. | |
| ORTELLI, JOSEPH | England, c.1800, PHIM | Wheel Barometer = X. | Reading. | Goodison 1. | |
| ORTELLI, JOSEPH, AND CO. | England, fl.1809-18, PHIM | Wheel Barometer = X; Stick Barometer = X. | 20 Cross Street, Hatton Garden, London. | Goodison 1. | |
| ORTELLI, N. | England, PHIM | Wheel Barometer = X. | Goodison 1. | ||
| ORTELLI, N., AND CO. | England, PHIM | Wheel Barometer = X; Stick Barometer = Christie SK 4/17/86. | Goodison 1; RSW. | ||
| ORTELLI, P., AND CO. | England, 1805, PHIM | Wheel Barometer, 1805 = X; Stick Barometer, 1805 = Christie-SK 4/17/86. | see Ortelli and Co. 1. | Macclesfield. | Goodison 1; RSW. |
| ORTELLI, PETER | England, fl.1835-56, PHIM | barometer and thermometer maker; partner in Ortelli and Primavesi. | 3 Leather Lane (1835-51); 49 Hatton Garden (1848-51); 15 Leather Lane (1852-56); all in London. | Goodison 1. | |
| ORTIZ, IGNACIO | Spain?, 1733, MIM | Universal Ring Sundial, 1733 = D.(1986). | marked on the ring is "en la puebla." | Coffeen 2. | |
| OS, MATHIAS VON | Germanyfl.1561-89, MIM | Astrolabe, 1589 = HEI. | ICA-597; clockmaker. | Lübeck. | Zinner 1; Price 1; ICA 2. |
| OSBORN, BENJAMIN | England, c.1838, MIM PHIM | 9 Northampton Square, London. | Taylor 2(2196). | ||
| OSBORN, THOMAS | England, fl.1586-93, MIM SIM | the maker of Thomas Fale's graphometer; Fale called him "a good workman"; invented a dialing instrument. | Taylor 1(75) 2(76); Dewhirst; Clay and Court. | ||
| OSBORNE 1 | England, c.1830, OIM | see Ashmore and Osborne | 42 Burgess Street, Sheffield. | Taylor 2(1767) & (1949); RSW. | |
| OSBORNE 2 | England, OIM | Telescope = New London County Historical Society, Conn. | London. | USNM. | |
| OSBORNE, GEORGE | England, fl.1625-28, | invented a semicircular instrument. | Hull. | Taylor 1(151). | |
| OSBORNE, MURRAY | Scotland, fl1776-1817, MIM | apprenticed to James Watt. | Gallowgate (1783-1801); 406 Gallowgate (1803-17); both in Glasgow. | Bryden 3. | |
| OSBORNE, THOMAS 1 | see Thomas Osborn. | Fale, "Horologiagraphica"; Clay and Court. | |||
| OSBORNE, THOMAS 2 | England, c.1801, MIM PHIM | astronomical clock maker. | Vauxhall Street, Birmingham. | Bryden 9. | |
| OSLER, FOLLETT | England, 1845, PHIM | Anemometer, 1845 = Royal Exchange, London. | Practical Mechanic and Engineer's Magazine, Vol. IV, p.139. | ||
| OSTERLAND, C. | Germany, c.1850, PHIM | Mineralogical Kit = KEN; Mining Compass = Soth. 3/10/87. | the kit marked "Mechaniker"; the compass marked "Patent." | Friedberg, Saxony. | G.L'E. Turner 24; RSW. |
| OSTRAVSKY, JOHANNES ANTONIUS | 1719, MIM | Horizontal Sundial, 1719 = BM. | Price 3; Ward 4. | ||
| OSWALDUS, FRIDERICUS | 1636, MIM | Measuring Rod, 1636 = DRE. | "inv. et fac." | RSW. | |
| OTERSCHADEN, JOHN | Belgium, fl.1580-1613, MIM | Pair of Globes = NMM-Caird; Terrestrial Gores = H.P. Kraus; Pair of Gores = Hispanic Society, New York, N.Y. | NMM 2; Yonge. | ||
| OTLEY, JONATHAN | England, fl.1818-28, MIM | watchmaker; "ingenious mechanic." | Kesick. | Taylor 2(1399). | |
| OTTER, CHRISTIAN | Germany, 1598-1660, MIM | Table Sundial = Königsberg Städt Kundtsammlung. | made linkage nstruments to solve geometrical problems; worked with Van Call, the clockmaker, from 1658-60. | Zinner 1. | |
| OTTHEINRICH HERZOG VON DER PFALZ | Germany, 1502-59, MIM | Horizontal Sundials, gilt-brass, 1547 = ADL-M237, van Alfen Coll., D.(1969). | the van Alfen and D. sundials are signed "O.H.P." (Ott Heinrich Pfalzgraf); the Adler dial is signed "M.D.Z.O.H.P." (Mit Der Zeit Ott Heinrich Pfalzgraf) and "O.H.P. Auctor" on the back; the dealer's dial is mounted on a stone base; the van Alfen dial is mounted on an ebony base; Mit Der Zeit is said to be Ottheinrich's personal motto; he bought an astrolabe, two ivory sundials and an armillary sphere from Georg Hartmann in 1544. | Palatinate. | Zinner 1; Engelmann 1; Moran; Michel 3; Holland's Glorie; A.J. Turner 10; ADL; RSW. |
| OTTWAY, JOHN | England, fl.1826-70, MIM OIM PHIM | Telescope = D.(1985); Wheel Barometer = X. | T.C. | 87 St. Johns Road (1826-33); 5 York Street, Covent Garden (1830-39); 10 King Street, Holborn (1840-41); 11 Devonshire Street, Queen Square (1842-48); 33 Upper King Street (1849-51); all in London. | Taylor 2(1950); Goodison 1; Crawforth 1 & 6; RSW. |
| OTTWAY, W. | England, OIM | Telescope, refracting = Christie-SK 6/2/83. | Ealing. | RSW. | |
| OTTWAY, W., AND CO. | England, c.1850, MIM OIM SIM | Telescopes, single draw = Christie-SK 3/31/83 & 4/17/86, Phillips 6/15/76; Dumpy Level = Phillips 2/22/77. | Ealing, London. | RSW. | |
| OUDRY | France, c.1820, MIM | Rule = P.C. | RSW. | ||
| OUGHTRED, WILLIAM | England, 1575-1660, | invented the double horizontal sundial, now called the Oughtred-type; invented a calculating device which he called his "circles of proportion"and a straight slide rule; author; mathematician; had William Forster as a pupil. | Albury; Cambridge. | Taylor 1(94); Evans 1; Gunther 2; Michel 3; A.J. Turner 10. | |
| OULD, HENRY | England, fl.1791-94, MIM NIM | apprenticed to Benjamin Cole 2 in the Merchant Taylors' Company, Nov. 7, 1759; worked for Edward Nairne; had his own business by 1794; T.C.; patented an improvement for a quadrant in 1791. | Dartmouth; No.4 New Court, Great New Street, Fetter Lane, London; 59 Lower East Smithfield, London (1794). | Taylor 2(1021); Crawforth 6, 7 & 8. | |
| OUTHIER, ABBE D.REGINALD | France, 1694-1774, | Abbé Outhier; invented a drive mechanism for celestial globes in 1727; invented a planetarium in 1727; both types were made by Jean-Baptiste Cattin; Outhier made improvements in odometer invented by Meynier 1. | Besançon (1727); rue Genégau, Paris. | Cons. Nat'l; Beckmann; RSW. | |
| OUVIERE | France, MIM | Cosmograph, copper = Drouot 4/26/67. | Ouvière. | Marseilles. | Evans 1; RSW. |
| OVERING, THOMAS | England, PHIM | Balance = Kendal Museum. | T.C.; "Seller of Scales, Weights of all Measures." | London. | RSW. |
| OWEN | see Barrow and Owen. | RSW. | |||
| OWEN, BENJAMIN | England, c.1687, | apprenticed to Isaac Webb of the Clockmakers' Company on Sept. 29, 1687; turned over to William Newton 1. | J. Brown 3. | ||
| OWEN, JAMES | England, c.1803, MIM | apprenticed to William Evans 1 of the Grocers' Company on May 7, 1795; free of the Company Jan. 6, 1803. | J. Brown 1. | ||
| OWEN, WILLIAM | England, c.1810, PHIM | Wheel Barometers = X, Soth. 5/12/72. | the barometers are signed "Owen Oswestry." | Oswestry. | Goodison 1; Baillie 1; RSW. |
| OWENS, OWEN | England, fl.1794-1825, NIM OIM | Sextants = NMM, PEA (1797); Octants = Saint-Brieuc 8/4/79, Christie-SK 11/2/95; Hadley's Quadrant = Dukes County Historical Society, Edgartown, Mass.; Quadrant = Pugsley Sale; Telescope = BMM. | the Pugsley quadrant is marked for the owner "Daniel Russell 1796"; Christie-SK is marked "Made for Bartholomew Downing ct. 21, 1794." | 4 South Castle Street, Liverpool. | Taylor 2(1400); Bryden 9; Brewington 1; American Neptune, Jan. 1975; RSW. |
| OXENFORD, JOHN | England, fl.1713-48, MIM | apprenticed to Edmund Blow in the Joiners' Company on Jan. 13, 1704; free in the Company, Dec. 1,1713; took an apprentice. | Savage Garden, London (1724). | Crawforth 7. | |
| OXLY, HENRY | England, c.1780, PHIM | Coin Balance = WHI. | 230 Upper Thames Street, London. | Olivia Brown 2. | |
| OXMANTOWN, LORD | Ireland, fl.1830-40, | made specula for microscopes and telescopes; author; F.R.S. | Taylor 2(2197). | ||
| OZANAM | France, 1688-1736, | author; desgned an instrument and published a book on "L'Usage de l'instrument universelle ou "pantometre"; a rectangular frame with the alidade pivoted at one corner; also published "l'Usage du compass de proportion" in 1736. | Paris. | Daumas 1. |
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