Milne horizontal pendulum seismograph, by R.W. Munro, London, 1899. The instrument was adopted by the British Association as a standard observatory instrument. Milne horizontal pendulum seismograph, 1899. 1899
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