Leipzig, Ambrosius Barth, 1920. 8vo. In contemporary full cloth with gilt lettering to spine. In "Annalen der Physik", Vierte Folge, Band 61. Entire volume offered. Library labels pasted on the pasted down front free end paper. Stamp to title page and repairs to first leaf (not affecting text), otherwise a fine copy. Pp. 69-86. [Entire volume: 760, VIII pp.].
First appearance of Schrödinger's paper concerning the coherence of wide open bundles.
Order-nr.: 50322