‎"LOCKYER, JOSEPH NORMAN.‎
‎Researches in Spectrum-Analysis in connection with the Spectrum of the Sun.- No. V. Received April 20, - Read May 23, 1878.‎

‎(London, Harrison and Sons, 1881). 4to. No wrappers as extracted from ""Philosophical Transactions"" Year 1881, Volume 172. Pp. 561-576 a. 1 double page folded photographic plate of the spectrum of the sun (autotyped).‎

Reference : 44183

‎First appearance of this paper in which Lockyer explores the photographic technics in relation to the spectra of the sun and the photographic processes employed.""Joseph Norman Lockeyer (1836-1920), pioneer English astrophysicist. He made importent advances in the field of solar and stellar physics, and is responsible for naming the element helium, for emphasizing the two-branch theory of stellar evolution, and (jointly with Janssen) for the method of observing solar prominences without an eclipsee."" (Source Book in Astronomy).‎