Specimen of Dover-Calais telegraph cable, 1851
1851
Cylinder electrical machine, 1810-1817
1810-1817
Pot with handle, “Hard pitch”
1790-1819
One pot with handle, containing pitch
1790-1819
One packet: “Coal pitch”
1790-1819
Two-Core Edison Tube
1882
Model of a birch bark canoe from North America
1926-1936
Tutton's goniometer, for cutting, grinding and polishing minerals, with case and components
1894
Model of Callendar's Sunshine Receiver, 19th Century
1895-1910
Speculum Metal Mirror, 1840-60
1840-1860
Every ready battery, 1917
1917
Circular plate in metal framework with central hole
1800-1850
James Goddard type Cloud Mirror, 1862
1862
29 pieces of square glass plate; three convex lenses
1800-1850
Polished glass blank
Concave iron block with crystal quartz attached
Six lenses of varying size and type
Block of lenses (4) on iron polishing tool
1909
Polished glass blank in mount
Mahogany case containing polishing discs, tools etc.
1894
Tutton's goniometer
1894
Block of lenses (7) ground with fine emery by J.H. Dallmayer Ltd.
1909
Large block of 'Adew' lenses (62) partly polished by J. H. Dallmayer Ltd.
1909
Two-Core Edison Tube
1882
Jar, “Asphaltum” blue and white lid
1790-1819
Four speculum metal secondary mirrors thought to have been made by James Nasmyth
1850-1870
Lead junction box
Section of Two-Core Edison Tube
1882