M.51 the Whirlpool Galaxy Size:XL: 90 x 90cm A perspective view of a

A perspective view of a horse-gin operated pile driver

The Royal Society's copy was donated by the author on 20 January 1791

' The equipment is mounted on a wheeled trolley in front of a screen

Old Bond Street

M.51 the Whirlpool Galaxy Size:XL: 90 x 90cm A perspective view of aPlate 10 figure 25 for the paper "Observations of nebulae and clusters of stars, made at Slough, with a twenty feet reflector, between the years 1825 and 1833", by Sir John Frederick William Herschel, Philosophical Transactions of the Royal Society, v. 123 (1833), pp. 359 505. Inscribed verso, in pencil, "Messier 51" with right ascension and North polar distance. Original: pencil on board. 1833