- Chapman , Allan . 1983 . A Study of the Accuracy of Scale Graduations on a Group of European Astrolabes . Annals of Science , 40 : 473 – 488 . See also Allan Chapman, ‘Dividing the Circle’ (unpublished D.Phil. thesis, University of Oxford, 1976), chapter 1; and Allan Chapman, Dividing the Circle (Amersham, forthcoming), chapter 11.
- Details of the technique can be found in Chapman A Study of the Accuracy of Scale Graduations on a Group of European Astrolabes Annals of Science 1983 40 144 146
- Details of the technique can be found in Chapman A Study of the Accuracy of Scale Graduations on a Group of European Astrolabes Annals of Science 1983 40 144 146
- This information is contained in a letter from Joseph Crosthwait to Abraham Sharp, January 27, 1721–2. It is bound in date order in a manuscript volume entitled ‘Sharp Letters’, in the Royal Society Library, ref. FlSh xxiv d. Part of the letter is also printed in Baily's Francis Account of the Revd. John Flamsteed London 1835 346 346 The Mural Arc, which encompassed 140°, came into use in 1688, and remained the principal instrument until 1719. It was sold following Flamsteed's death, and its whereabouts unknown after about 1722.
- The quadrant's current accession no. is 1975.54. I am indebted to Dr. A. D. C. Simpson, of the Royal Scottish Museum, for further information about this instrument. It was included in 1876, in the exhibition of scientific apparatus at South Kensington as Item 1773. See Catalogue , third edition 398 398 See also David Bryden's “Britain's First Observatory”, Journal for the History of Astronomy, 3 (1972), 205.
- Originally published in Flamsteed John Historia Coelestis Britannica London 1725 III and reproduced in The ‘Preface’ to John Flamsteed's “Historia Coelestis Britannica’, edited with Introduction by Allan Chapman, National Maritime Museum Monographs and Reports No. 52 (London, 1982), figure 19.
- All of the Place engravings are reproduced in Howse D. Francis Place and the Early Royal Observatory New York 1975 References to specific instruments depicted in the engravings are given beneath the figures.
- Hooke , Robert . 1674 . Animadversions on the first part of the Machina Coelestis of …Johannes Hevelius London fold-out plate.
- Flamsteed . 1725 . Historia Coelestis Britannica Vol. III , London
- A modern reproduction of Thornhill's painting can be seen in Howse Derek The Buildings and Instruments, volume III of Greenwich Observatory London 1975 figure 22.
Annals of Science
Volume 40, 1983 - Issue 5