HerschelJ. F. W., “On the aberrations of compound lenses and object-glasses”, Philosophical transactions of the Royal Society of London (1821), 222–67, p. 222.
2.
Ibid., 261.
3.
KingH. C., The history of the telescope (London, 1955), 191–2.
4.
SouthJ., “Results of some astronomical observations …”, Quarterly journal of science, literature and the arts, xiii (1822), 386, note plate v.
5.
See, for example King, op. cit., 192.
6.
PearsonW., An introduction to practical astronomy (London, 1829), 36.
7.
Encyclopaedia metropolitana, ed. SmedleyE., Mixed sciences, ii (London, 1830), 427.
