Waywiser by W. & S. Jones, early 19th century Waywiser by W. & S. Jones, early 19th century Surveying 1791-1859
Linen tape in bakelite casing, 20 metres, manufactured by J. Chesterman & Co. Limited, Sheffield, England, 1951-1960 Linen 20-metre tape, British, 1951-1960 Surveying 1951-1960
Optical range-finder, arranged for gallery demonstration, c.1940s Optical range-finder, arranged for gallery demonst Surveying
Colby's Compensation Bars, as used on the Lough Foyle Base, 1827-1828 Colby's Compensation Bars Surveying 1827
Prismatic magnetic compass by John Dover, London & Charlton, England, 1851-1865 Prismatic compass, 1851-1865 Surveying 1851-1865
Prismatic astrolabe, including sighting telescope, base, main stand and accessories, including prisms, designed by Claude and Driencourt, made by Jobin, c. 1900. Objects in fitted wooden cases. Prismatic astrolabe, French, 1895-1905 Surveying 1895-1905
Everest type theodolite, 4-inch, by Troughton & Simms, London, England, 1875-1899 Everest type theodolite, British, 1875-1899 Surveying 1875-1899
Radical line plotter by Hilger & Watts, No.101126, 1950-1970 Radical line plotter by Hilger & Watts, No.101126, Surveying 1950-1970
Simple theodolite, with box, trade card and brass parts, by James Search of London, 1771-1781 Simple theodolite and case, 1771-1781 Surveying 1771-1781
