Paper, 'On [Charles] Wolf and [Georges] Rayet's bright-line stars in Cygnus' by William Huggins and Margaret Lindsay Huggins The authors write: 'In 1867 MM. Wolf and Rayet discovered at the Paris Observatory three small stars in Cygnus, which in the spectroscope showed several bright lines upon a continuous spectrum. All three stars have a very bright band in the blue part of the spectrum. These stars are: –B. D. + 35°, No. 4001. B. D. + 35°, No. 4013. B. D. + 36°, No. 3956.' Annotations in pencil and ink. Includes one page of spectrum diagrams. Subject: Astronomy / Spectroscopy Received 25 November 1890. Read 11 December 1890. A version of this paper was published in volume 49 of the Proceedings of the Royal Society as 'On Wolf and Rayet's bright-line stars in Cygnus'. 1890