Wechselwirkung neutraler Atome und homöopolare Bindung nach der Quantenmechanik in Zeitschrift für Physik 44, 1927. pp. 455-473 (Heitler and London). Zur quantenmechanik einfacher bewegungstypen in Zeitschrift für Physik, Volume 44, 1927. pp. 326-352 (Kennard) [FULL VOLUME]

Berlin: Julius Springer. 1st Edition. FIRST EDITION OF THE FIRST APPLICATION OF WAVE MECHANICS TO THE THEORY OF CHEMICAL BONDING.

"In 1927 the Heitler-London theory was formulated which for the first time enabled the calculation of bonding properties of the hydrogen molecule based on quantum mechanical considerations. Specifically, Walter Heitler determined how to use Schrödinger's wave equation (1925) to show how two hydrogen atom wavefunctions join together, with plus, minus, and exchange terms, to form a covalent bond. He then called up his associate Fritz London and they worked out the details of the theory over the course of the night" (Wikipedia).

ALSO PRESENT: "Zur quantenmechanik einfacher bewegungstypen" by E. H. Kennard - the first mathematically correct formulation of the Heisenberg uncertainty principle. Kennard derived the formula for uncertainty of position and momentum a few months after Heisenberg stated his principle in general terms. CONDITION & DETAILS: Berlin: Julius Springer. 4to (9 x 6.5; 225 x 163mm). Zeitschrift für Physik,Volume 44, 1927. 8vo. (9 x 6.25 inches). [viii], 903 pages, [3]. Kennard: 326-352; Heitler and Fritz, 455-473. Ex-libris Physikalische Gesellschaft with small stamp on front flyleaf and two small stamps on the title page. No spine markings whatsoever. In-text figures throughout. Bound in black cloth over slightly scuffed marbled paper boards. Gilt-lettered spine. Very tightly bound. Bright and very clean throughout. Very good condition.