Comets and Meteors / Their phenomena in all ages; their mutual relations; and the theory of their origin.

by Daniel Kirkwood

[1] Meteoric Astronomy.

[2] Hind.

[3] The Chinese, however, as appears from Biot's researches, had observed the same fact 700 years earlier. See Humboldt's Cosmos, vol. iv. (Bohn's ed.), p. 544.

[4] See the Catalogues of Chambers and Williams.

[5] The average number.

[6] Monthly Notices of the R. A. S., vol. xxv., p. 243.

[7] Dr. Lardner.

[8] The tail of the first comet of 1865 (observed in the Southern Hemisphere) attained the unprecedented length of 150°.—M. N. R. A. S., vol. xxv., p. 220.

[9] This chapter is the substance of a paper read before the American Philosophical Society, November 19, 1869.

[10] Halley's comet in aphelio is too remote from the plane of the ecliptic to be much disturbed by Neptune. Has the original position of the orbit been changed by Jupiter's influence?