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Description: | An elliptical plane mirror made as a secondary mirror for a Newtonian reflector telescope. Housed in a tin. Brass mounted, with iron cover not fitting very closely. This flat was probably used with the 20ft telescope before the latter was converted to the front view form.
William Herschel, with help from his brother Alexander and his sister Caroline made a number of these mirrors to go in the telescopes they made to use and to sell.
AUDIT - one unumbered part (case)_
caption: Record Shot - Do not reproduce.
caption: Elliptical plane mirror | Publisher: | "http://collections.rmg.co.uk/" | Rights holder: | "Royal Museums Greenwich" | Subjects: | Johann Alexander Herschel elliptical plane mirrors Sir William Herschel | Source: | Royal Museums Greenwich | Identifier: | http://collections.rmg.co.uk/collections... | Go to resource |
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