RonanColin A., Edmond Halley: Genius in eclipse (London, 1969), 8. The quadrant is wrongly described as a sextant in Biographia Britannica.
7.
Armitage, Edmond Halley, 40; “Memoir of Dr. Edmond Halley”, in Correspondence and papers of Edmond Halley, ed. by MacPikeE. F. (Oxford, 1932), 1–13, p. 6.
8.
Halley, Catalogus, preface.
9.
FlamsteedJohn, Historia coelestis (London, 1712), Bk 1, Part 3, p. 109.
10.
Letter from Arthur Storer to Newton, 26 April 1683, in The correspondence of Isaac Newton, ii, ed. by TurnbullH. W. (Cambridge, 1960), 387–94.
11.
VsekhsvyatskiiS. K., Physical characteristics of comets (Jerusalem, 1964), 120–1.
12.
YeomansD. Y. and KiangT., “The long-term motion of Comet Halley”, Monthly notices of the Royal Astronomical Society, cxcvii (1981), 633–46.