Recherches sur le Spectre Solaire. [With:] Spectre normal du soleil. Atlas de six Planches.
Upsalla: W. Schultz, 1868. First edition, a very fine copy in unrestored original printed wrappers, and rare thus, of one of the founding works of spectroscopy in which Ångström demonstrated the presence of hydrogen and a number of other elements in the sun; the atlas contains his great map of..... More
Item #4831