RecordTelescope micrometer (detail)< 1 of 1 > Back made in Dublin
Telescope micrometer (detail)Micrometers are used by astronomical observers to measure angular separations between stars seen through their optical telescopes. This is a detail of a micrometer made around 1880 in the workshop of Grubb of Dublin, an internationally famous manufacturer of telescopes. The micrometer once belonged to the Paisley Astronomical Society, where it was attached to their 10-inch refractor. The Society was amalgamated with another during the 1970s. This detail shows the signature of the maker, Dublin-based Howard Grubb, whose factory supplied worldwide some 90 first-class telescopes ranging in diameter from 5 inches to 28 inches, between 1890 and 1914. Howard Grubb (1844-1931) was the son of Thomas Grubb, who had established a successful business in Dublin manufacturing scientific instruments. Howard Grubb's reputation rested upon his design and construction of astronomical telescopes and observatory fittings on an international scale. Record detailsTo search on related items, click any linked text below.
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