FIRST PRINTING IN ORIGINAL WRAPPERS OF DE BROGLIE'S 1922 PAPER ASSIGNING MASS TO PHOTONS: "THE SEED FROM WHICH DE BROGLIE'S SUBSEQUENT WORK GREW."
"In 1922 [de Broglie] published a paper on treating blackbody radiation as a gas of light quanta. In this paper, de Broglie made the unusual assumption that photons has a very small but non-zero rest mass m0. He was therefore now applying Einstein's relations E = hv and p = h/λ (relating energy and momentum to frequency and wavelength) to massive particles, even if these were still only photons. It seems that de Broglie made the assumption m0 does not equal 0 so that light quanta could be treated in the same way as ordinary material particles. It appears that this paper was the seed from which de Broglie's subsequent work grew" (Bacciagaluppi and Valentini, Quantum Theory at the Crossroads: Reconsidering the 1927 Solvay Conference).
IN: Le Journal de Physique et le Radium, Tome III, Série VI, November 1922, pp. 422-428. Paris: La Societe Francaise de Physique, 1922. Octavo, original wrappers; custom box. Wear to spine, pen notation correcting the issue number from "10" to "11". An outstanding copy in original wrappers with no institutional stamps. RARE.
Price: $2,400 .