Equatorial sextant at the Royal Observatory, Greenwich mb-height 973 Doug McClelland

Doug McClelland

Johnny Byrne

Queen are rehearsing for their forthcoming tour of South America

plate II of Industry and Idleness 1747

(Alderman Curtis)

Equatorial sextant at the Royal Observatory, Greenwich mb-height 973 Doug McClellandExterior scene showing a rear view of the 7 foot equatorial sextant with a telescopic sight designed for the old Royal Observatory by John Flamsteed (1646 1719) the first Astronomer Royal. The instrument is on an observing platform upon which can be seen stepladders and a lantern. Plate 4 (right half detail) from Ichnographia speculae Regiae Grenovici exquisite facta (London, 1676) a series of engravings commissioned by Sir Jonas Moore, the leading