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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 19.05mm. It has a large thread and is made up of a large wooden mount with large brass silvered circle. The wire is missing.
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.
caption: Composition of F3348 and F3340 - Eyepiece Micrometer
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 Sir William Herschel | Source: | Royal Museums Greenwich | Identifier: | http://collections.rmg.co.uk/collections... | Go to resource |
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