‎"PAULI, W.‎
‎Über das Modell des Wasserstoffmolekülions. - [PAULI'S EXTENDED DOCTORAL THESIS - THE PAULI-NIESSEN MODEL]‎

‎Leipzig, Ambrosius Barth, 1922. 8vo. In contemporary half cloth with gilt lettering to spine. In ""Annalen der Physik"", Vierte Folge, band 68. Entire volume offered. Stamp to verso of title-page and a few light occassional brown spots Lower corner of back board torn off, otherwise fine and clean. Pp. 177-240. [Entire volume: VII, (1), 632 pp. + 1 plate.)‎

Reference : 50981

‎First appearance of Pauli's extended doctoral thesis in which he presents what was later named the Pauli-Niessen Model. Their works helped to show the inadequacy of the old quantum mechanics, which gave physicists the impetus to explore new paths which led to the matrix mechanics formulation of quantum mechanics by Werner Heisenberg and Max Born in 1925 and the wave mechanics formulation by Erwin Schrödinger in 1926, which were shown to be equivalent.Karel Niessen, Dutch theoretical physicist, published his doctoral thesis the year after Pauli. ‎