Publisher:
Leipzig & Berlin:, B.G. Teubner, 1910.: 1910
8vo. VIII, 435 pp. 235 figs., 7 plates (mostly colored), indexes. Original half black cloth, boards, gilt spine. Bookplate, rubber-stamps and signature (on title) of Paul Thalmann, Bern (German physics professor, 1922). Important study of the spectrum of the sun. The plates are partly taken from the work of Secchi.
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