LOCKYER, JOSEPH NORMAN.

The Total Eclipse of the Sun, April 16th, 1893 - Report and Discussion of the Observations relating to Solar Physics.

(London, Harrison and Sons, 1897). 4to. No wrappers as extracted from "Philosophical Transactions" Year 1896, Volume 187. Pp. 551-618 a. 4 plates (2 double-page) reproductions of photographs taken. many textillustrations describing apparatus etc.

First edition. The paper interpretates the photographs and the spectra taken of the sun under the total eclipse in 1893.

"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.: 44184