THE quantum theory of line spectra developed by Bohr has been most successful in explaining the spectrum of hydrogen and helium, and by a further hypothesis the spectra of the alkali metals. By ...
Imprint from colophon, p. [4] of cover: Uforandret optrykt efter Originalem, København 1928. Fotozinktrykt hos Tutein & Koch. Imprint on p. [1] of cover: København ...
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