Leipzig: Barth, 1907. 1st Edition. FIRST EDITION OF EINSTEIN’S 1st STATEMENT OF THE FULL EQUIVALENCE OF MASS AND ENERGY AND THE EQUATION E = MC² (written as µ = E/V²). In ‘On the Inertia of Energy Required by the Relativity Principle’ (pp. 371-384), “Einstein discussed the relationship between inertial mass and energy, arguing for their complete equivalence, namely, that every mass has an equivalent energy just as every form of energy has an equivalent mass. This relation says that a photon can convert into matter with the appropriate mass, and vice versa. He deduced the exact expression for the equivalence of mass and energy, his celebrated equation E = mc2” (Calaprice, The Einstein Almanac, 16, p. 20).
Among other papers of import, is The -particle and the periodic system of the elements by the Dutch amateur physicist Antonius Johannes van den Broek. In it, van den Broek proposed that the alpha particle, recently discovered by Ernest Rutherford, consisted of one half a helium atom (a particle with an atomic weight of two and a positive charge of one) and that the alpha particle was a component of all other atoms, similar in notion to the hydrogen atom in Proust’s theory. He was correct in his first supposition and incorrect in his second. He used this theory to propose a new periodic table with 41 spaces for undiscovered elements.
ALSO INCLUDED: Two other papers by Einstein (1) “Ueber die Moeglichkeit einer neuen Pruefung des Relativitatsprinzips,” (Possibility of a new examination of the relativity principle and (2) “Bemerkungen zu der Notiz von Hrn. Paul Ehrenfest: "Die translation deformierbarer Elektronen und der Flaechensatz,” (Comments on the note by Mr Paul Ehrenfest's "Translation of deformed electrons and the surface theorem).
ALSO INCLUDED: Wien’s paper on absolute positive ions of radiated energy and entropy of spectral lines.
ALSO INCLUDED: von Laue’s paper on the entropy of partially coherent bundles of rays. “Soon after Planck pro- posed his radiation law and the associated equation for the spectral entropy, von Laue2 analysed the phenomena of interference from a thermodynamical perspective, discussing the applicability of the second law to radiation and the additivity of the entropy. His ideas were mostly continued in the fields of coherence and polariazation, where the radiation entropy approach has proven to be very productive” (Delgado-Bonal, Entropy of radiation: the unseen side of light, Nature (Scientific Reports Online), May 2017). Item #1513
CONDITION & DETAILS: Leipzig: Barth. Complete. 4 fold-out plates. 8vo. (8 x 5 inches; 200 x 125mm). Full volume. Two discreet ex-libris stamps one on the half-title, another on the title.  viii, , 4. Handsomely rebound in three-quarter black calf over marbled paper boards. Tight and solid. Three raised bands at the gilt-lettered spine. Near fine condition.