A Popular History of Astronomy During the Nineteenth Century / Fourth Edition

by Agnes M. Clerke

FOOTNOTES:

[1630] Comptes Rendus, t. xliv., p. 339.

[1631] A. A. Common, Memoirs R. Astr. Soc., vol. i., p. 118.

[1632] Newcomb, Pop. Astr., p. 137.

[1633] Month. Not., vol. liv., p. 67.

[1634] Keeler, Publ. Astr. Pac. Soc., vol. ii., p. 160.

[1635] H. Grubb, Trans. Roy. Dub. Soc., vol. i. (new ser.), p. 2.

[1636] Hale, nevertheless (Astroph. Jour., vol. v., p. 128), considers that refractors preserve their superiority of visual light-grasp over Newtonian reflectors up to an aperture of 52-1/2, while equalisation is reached for the photographic rays at 34 inches.

[1637] Astroph. Jour., vol. v., p. 130.

[1638] Phil. Trans., vol. cxlviii., p. 465.