Heliostat with spring driven clock drive for use with table top spectrometers by Adam Hilger Ltd. 1919
Gold-plated grazing - incidence paraboloidal mirror for X-ray astronomy Gold-plated grazing - incidence paraboloidal mirror for X-ray astronomy 1975-1980
Electrographic camera of aperture 4 cm plus operating console by Wallis of Worthing. Electrographic camera 1975-1980
Photograph showing a selection of scientific instruments from the Physical Cabinet (collection) of the Royal University of Padua, Italy. These include heliostats by Tessarolo and Silbermann, a projector by Duboscq, lamp by Carlevaris, lamp for producing Drummond's light, and regulator for an electric arc lamp. The print was supplied by Prof Rossetti for display at the 1876 Loan Exhibition held at the South Kensington Museums, London. Photograph showing a selection of scientific instruments from the Physical Cabinet of the Royal University of Padua 1876
Shutter for observing Aurora, H.O.5, on brass foot 4" diam. sliding pillar, wedge about 6 1/2" long, 3/4" wide, rack and pinion adjustment, scale in inches and 1/10 nod 0 to 65, vernier (unusual kind) and wooden case. Wooden velvet covered cap for eye end, brass view tube 8 1/2" long with sliding tube, extra brass end for glass Shutter for observing Aurora 1870-1890
Modern clock heliostat with Japanese markings Modern clock heliostat with Japanese markings 1900-1930
Two photograph mounted together of an 18inch Coelostat, made for the Canberra Observatory, New South Wales by Sir Howard Grubb, Parsons & Company at their optical works in Newcastle-on-Tyne, England. Two photograph mounted together of an 18inch Coelostat 1921-1931
Photograph of Universal heliostat designed by Lord Blythswood [mounted with 1876-1001/2/3] Photograph of Universal heliostat designed by Lord Blythswood 1876
Photograph of siderostat by Foucault of the Paris Observatory [mounted with 1876-1001/3/4] Photograph of siderostat by Foucault of the Paris Observatory 1876
Camera assembly, parts of an image photon counting system used on the Anglo-Australian Telescope at Siding Springs in New South Wales, Australia. Camera assembly 1975-1980
Photograph of the original Gravesande Heliostat in the Conservatoire des Arts et Metiers, Paris Photograph of the original Gravesande Heliostat in the Conservatoire des Arts et Metiers 1876
Solar telescope consisting of heliostat with fixed mirror and extending lens, made for use in the 'Exploration Gallery' to project an image of the Sun into the display. Solar telescope consisting of heliostat with fixed mirror and extending lens 1975-1977
Eyepiece for solar observations signed "Steinheil in Munchen No.2065" in fitted box Eyepiece for solar observations in fitted box 1850-1862
Solar eyepiece in brass, by Dollond to Dawes' pattern, in fitted mahogany box with trade label Solar eyepiece in brass 1840-1870
Artificial horizon; black glass 2 1/8" with 3 levelling screws, in black fish-skin case, with level (not original) Artificial horizon; black glass 2 1/8" with 3 levelling screws 1840-1860
Photograph of siderostat by T. Cooke and Sons, Royal Society [mounted with 1876-1001/2/4] Photograph of siderostat by T Cooke and Sons, Royal Society 1876
Image Photon Counting System, prototype version, plus associated documentation designed by Prof. Boksenberg and used on the Hale Telescope at Mt. Palomar. Image Photon Counting System, 1973 1973
One of two photographs of a siderostat constructed by Messrs Cooke and Sons of York, for the Royal Society One of two photographs of a siderostat constructed by Messrs Cooke and Sons of York
One of two photographs of a siderostat constructed by Messrs Cooke and Sons of York, for the Royal Society One of two photographs of a siderostat constructed by Messrs Cooke and Sons of York
Photograph of 18" Siderostat in glazed frame 17 1/4" x 21 1/4" Photograph of 18" Siderostat in glazed frame 17 1/4" x 21 1/4" 1921