Weights from the Castlereagh Collection for St Petersburg (Russia). Set of 8 cylindrical knobbed brass weights in fitted wooden block with 7 flat brass grain weights. Weights from the Castlereagh Collection for St Petersburg 1800-1818
Glass framed photograph, time lapse sequence of the partially eclipsed Sun and corona at totality 1912
Research microscope with interchangable monocular and binocular attachements quadruple nosepiece and mechanical stage 1970-1985
Weights and original correspondence from the Castlereagh Collection for St Petersburg (Russia). Set of 8 cylindrical knobbed brass weights in fitted wooden block with 7 flat brass grain weights. Weights and original correspondence from the Castlereagh Collection for St Petersburg 1800-1818
Photograph in glazed frame of Struve's base-line apparatus as used in Russia (1817-1855), taken 1870-1876. Presented by the Pulkowa Observatory, St. Petersburg, Russia. Photograph of surveying base-line apparatus, Russian, 1870-1876 1870-1876
Photograph of a transit instrument by Repsold at Pulkovo Observatory, St Petersburg, in Russia, 1876. Photograph of a transit instrument by Repsold at Pulkovo Observatory 1876
Photograph of an equatorial by Steinhiel, with a Zollner photometer at the Pulkovo Observatory, St Petersburg in Russia, 1876. Photograph of an equatorial by Steinhiel 1876
Photograph of a transit instrument, by the German instrument maker Ertel, in the Meridian Room of the Pulkovo Observatory at St Petersburg in Russia, 1876. Photograph of a transit instrument 1876
Photograph of a telescope made by M.Herbst for the Chief Observatory at Pulkovo Observatory, St Petersburg in Russia, 1876. Photograph of a telescope made by M.Herbst for the Chief Observatory at Pulkovo Observatory 1876
Photograph of the Transit instrument of the Harvard college Observatory at Cambridge Massachusetts. Photograph of transit instrument 1876
One of four photographic views of the Pulkovo Observatory, St Petersburg in Russia, 1876. One of four photographic views of the Pulkovo Observatory 1876
One of four photographic views of the Pulkovo Observatory, St Petersburg in Russia, 1876. One of four photographic views of the Pulkovo Observatory 1876
One of four photograph taken from the north side of the original buildings of the Pulkovo Observatory, St Petersburg in Russia, 1876. One of four photograph taken from the north side of the original buildings of the Pulkovo Observatory 1876
LOMO (Leningrad Optical and Mechanical Union) developing tank for 8 and 16mm film. LOMO developing tank
Smena Symbol or Cosmic Symbol camera. 35mm. Original carton, instructions, ERC. Cosmic Symbol Camera 1973-1993
Photograph of a vertical circle by Ertel at the Pulkovo Observatory, St Petersburg in Russia, 1876. Photograph of a vertical circle by Ertel at the Pulkovo Observatory 1876
Photograph of the portable stand made by M. Herbst for use with a refracting telescope by Merz (a telescope is shown on the stand) at the Pulkovo Observatory, St Petersburg in Russia, 1876. Photograph of the portable stand made by M. Herbst for use with a refracting telescope 1876
Photograph of an artificial horizon made for the observatory at the Military Academy at St. Petersburg in Russia. Photograph of an artificial horizon 1876
Photograph of a meridian circle by Repsold at Pulkovo Observatory, St Petersburg, Russia,. 1876. Photograph of a meridian circle by Repsold at Pulkovo Observatory 1876
Photograph of a large equatorial by Merz and Mahler at the Pulkovo Observatory, St Petersburg in Russia, 1876. Photograph of a large equatorial by Merz and Mahler at the Pulkovo Observatory 1876
One of four photographic views of the Pulkovo Observatory, St Petersburg in Russia, 1876. One of four photographic views of the Pulkovo Observatory 1876
Three-component seismograph designed by Russian seismologist Boris Golitsyn (Galitzin) and made by Hugo Masing, St Petersburg, Russia, 1910–1912. The two horizontal pendulums were purchased by Arthur Schuster and installed at Eskdalemuir Observatory, Dumfriesshire, Scotland in 1910; he donated the vertical component in 1912. In 1925 the assembly was transferred to Kew Observatory. Kew staff modified the instrument in 1937 so that all three components recorded onto a single drum, rather than separate ones as previously. Three-component seismograph designed by Boris Golitsyn (Galitzin) 1910-1912
Original correspondence from the Castlereagh Collection for St Petersburg (Russia). Original correspondence from the Castlereagh Collection for St Petersburg 1800-1818