Record

Reference numberMOB/022
LevelItem
TitleSpeculum by John Hadley
Datec.1720s
DescriptionA speculum mirror for a Newtonian reflector, with skewed handle for holding and five small wooden eyepieces (lenses missing in four out of five). In a custom made wooden carry case. Speculum created by John Hadley, carry case created by the Science Museum.
Extent1 instrument, 7 parts
FormatScientific Instrument
MaterialsMetal, wood
NotesOn loan to the Science Museum 1932- 2019; SM inventory number '1932-459'
Access statusOpen
ProvenanceExact provenance unknown. Mirror and telescope apparatus first shown to the Royal Society in 1721 and likely presented to the Society at a subsequent date by Hadley himself.
Related materialWritten about at length in John Hadley's paper, 'An account of a catadioptrick telescope [...]', Philosophical Transactions of the Royal Society, vol. 32, no. 376 (1723)
URL descriptionDigital version available on The Royal Society Picture Library
URLhttps://pictures.royalsociety.org/image-rs-18184
https://pictures.royalsociety.org/image-rs-18185
https://pictures.royalsociety.org/image-rs-18183
Fellows associated with this archive
CodeNameDates
NA7954Hadley; John (1682 - 1744)1682 - 1744
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