Manuscript, 'On the chief line of the spectrum of the nebulae [in Orion]' by J N [Joseph Norman] Lockyer Lockyer writes on the research of [William] Huggins into the position of the chief line of the spectrum of the nebulae in Orion 'relative to the line of lead near it.' See AP/67/8 for response from Huggins. Annotations in pencil throughout. Includes a letter dated 2 February 1890. Subject: Astronomy Received 18 December 1890. Read 5 February 1891. A version of this paper was published in volume 48 of the Proceedings of the Royal Society as 'On the chief line in the spectrum of the nebulæ'. 1890