Note 923 — Chapter XXXII · DOUBLE NEBULÆ.
Reading edition
J. Herschel, Phil. Trans. vol. cxxiii. p. 403; Rosse, Trans. Royal Dublin Soc. vol. ii. p. 95; Spitaler, Astr. Nach. No. 3168.
Reading edition
J. Herschel, Phil. Trans. vol. cxxiii. p. 403; Rosse, Trans. Royal Dublin Soc. vol. ii. p. 95; Spitaler, Astr. Nach. No. 3168.