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Seismograph - Gray-Milne, James White, Glasgow,1887 Object Reg. No: ST 041451

Gray-Milne Seismograph, designed by Thomas Gray and John Milne in Tokyo and made by James White in Glasgow, No. 5, 1887.

A seismograph measures earth tremors.

This seismograph was purchased for the Melbourne Observatory in 1888 at a cost of 55 pounds, and erected on the foundation of the north collimator pier in the new transit room for the 8-inch transit telescope.

The seismograph never worked very satisfactorily. Government Astronomer Robert Ellery reported in 1897 that the instrument had only ever recorded one earthquake. See Ellery to Charles Todd, 6 September 1897 [Public Record Office of Victoria series VPRS 775, Vol 7] In 1899 the Observatory purchased a newer design by Milne.
In wooden case with glass windows. Comprises 3 weights mounted on movable arms which correspond to 3 axes of space. The resultant movement is recorded on a kymograph, operated by clockwork.
Acquisition Information:
Donation from Melbourne Observatory, 1945
Discipline: Technology
Dimensions: 60 cm (Height), 52 cm (Width), 60 cm (Length)

More information

Tagged with: earthquakes, geophysical apparatus instruments, seismographs
Themes this item is part of: Melbourne Observatory Collection, Science & Measurement Collection, Positional Astronomy at Melbourne Observatory, Weights & Measures at Melbourne Observatory, Melbourne Observatory & Standard Time in Victoria, Astrographic Catalogue, Transits of Venus, 1874 & 1882, Buildings at Melbourne Observatory, Star Observations & Personal Equation, Meteorology at Melbourne Observatory, 1863-1908, Melbourne Observatory, 1863-1944, Geodetic Survey of Victoria, 1858-1872
On Display at: Melbourne Museum
Primary Classification: PHYSICAL SCIENCES
Secondary Classification: Geophysics - Seismology
Tertiary Classification: measuring equipment
Inscriptions: Oval maker's plate on base, marked: 'Gray & Milne's Seismograph, No. 5, James White, Glasgow'.

Clock dial marked 'J. White, Glasgow'.
Maker: James White - J. White, Glasgow, Scotland, Great Britain, 1887
User: Melbourne Observatory, South Yarra, Victoria, Australia, 1887-1901

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