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Description: | This is a parallel wire distance eyepiece micrometer which is a type of filar micrometer. The eyepiece micrometer has a focal length of 38.1mm. It has a large thread and has all its working parts made of brass, except the screw which is made of steel.
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: | eyepiece micrometers A Catalogue of Instruments made and (or) used by Sir William Herschel as Preserved at Slough & examined ther in 1924 May & June A Peep into Herschel's Workshop Micrometer Sir William Herschel | Source: | Royal Museums Greenwich | Identifier: | http://collections.rmg.co.uk/collections... | Go to resource |
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Eyepiece
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