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Telescope speculum grinding tool for Lord Rosse's 72-inch telescope at Birr Castle, Ireland mb-code 1645554 Dish thought to have been

SKU 93934875497
4.3
Telescope speculum grinding tool for Lord Rosse's 72-inch telescope at Birr Castle, Ireland mb-code 1645554 Dish thought to have been
Telescope speculum grinding tool for Lord Rosse's 72-inch telescope at Birr Castle, Ireland mb-code 1645554 Dish thought to have been
Telescope speculum grinding tool for Lord Rosse's 72-inch telescope at Birr Castle, Ireland mb-code 1645554 Dish thought to have been
Telescope speculum grinding tool for Lord Rosse's 72-inch telescope at Birr Castle, Ireland mb-code 1645554 Dish thought to have been
Description

Dish thought to have been used by Princess Elizabeth in 1554

View of the fire at the Custom House

'The murder'd cherub

9th October 1963

Telescope speculum grinding tool for Lord Rosse's 72-inch telescope at Birr Castle, Ireland mb-code 1645554 Dish thought to have beenPlate 24 figure 4 from the paper "On the construction of specula of six feet aperture; and a selection from the observations of nebulae made with them", by William Parsons, 3rd Earl of Rosse, Philosophical Transactions of the Royal Society, volume 151 (1861) pp. 681 746. A front view of the cast iron grinding tool used to produce the speculum of the reflecting telescope at Birr Castle, Parsonstown. The face has straight cast grooves forming squares

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