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).

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).

Order-nr.: 44183