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Description: | This is a parallel wire distance eyepiece micrometer which is a type of filar micrometer. This micrometer has no thread and is made up of a brass frames only, with a screw scale for counting revolutions, and small brass circle.
It would probably have been used to measure the distance between stars or between nebulae, star clusters and stars by the maker's older brother, William Herschel.
AUDITED
caption: Eyepiece micrometer | Publisher: | "http://collections.rmg.co.uk/" | Rights holder: | "Royal Museums Greenwich" | Subjects: | A Catalogue of Instruments made and (or) used by Sir William Herschel as Preserved at Slough & examined ther in 1924 May & June micrometer eyepieces A Peep into Herschel's Workshop Micrometer | Source: | Royal Museums Greenwich | Identifier: | http://collections.rmg.co.uk/collections... | Go to resource |
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