QuillHumphrey, John Harrison: The man who found longitude (New York, 1966).
2.
ForbesGray Eric, “The origin and development of the marine chronometer”, Annals of science, xxii (1966), 1–25.
3.
MudgeThomasJun., A narrative of facts relating to some time-keepers, constructed by Mr. Thomas Mudge for the discovery of longitude at sea; together with observations upon the conduct of the Astronomer Royal respecting them (London, 1792). This libellous attack provoked the Astronomer Royal, Rev. Nevil Maskelyne, to write An answer to a pamphlet entitled ‘A Narrative of Facts’, lately published by Mr. Thomas Mudge, Junior, relating to some time keepers constructed by his father Mr. Thomas Mudge, etc. (London, 1792). Nothing daunted, Thomas Mudge, jun. immediately retorted with A reply to the Answer of the Rev. Dr. Maskelyne, Astronomer Royal, to A Narrative of Facts, etc. (London, 1792).
4.
EarnshawThomas, Longitude. An appeal to the public etc. (London, 1808).
5.
GouldRupert T., The marine chronometer (London, 1923). This contains an introductory chapter on the various methods of longitude determination known at the beginning of the eighteenth century.
ForbesGray Eric, “The foundation and early development of the Nautical Almanac”, Journal of the Institute of Navigation, xviii (1965), 391–401.
8.
BirdJohn, The method of dividing astronomical instruments (London, 1767); and The method of constructing mural quadrants. Exemplified by a description of the brass mural quadrant in the Royal Observatory at Greenwich (London, 1768).
9.
RamsdenJesse, Description of an eingine for dividing mathematical instruments (London, 1779); and Description of an engine for dividing strait lines on mathematical instruments (London, 1779).
10.
MayW. E., “Early reflecting instruments”, The nautical magazine, no. 145 (1945), 21–6.
11.
In a letter to the Foreign Secretary, Lord Londonderry, dated Paris, 25 June 1821 (cf. Board of Longitude, Confirmed minutes for 1 November 1821).
12.
ForbesEric G., “The bicentenary of the Nautical Almanac (1767)”, British journal for the history of science, iii (1967), 393–4.
13.
The information contained in this paragraph is extracted from a personal communication to the writer from Mr Philip Laurie, Royal Greenwich Observatory, 12 February 1965.