Studier over metallernes elektrontheori. Afhandling for den filosofiske doktorgrad.
Copenhagen / Hannover: V. Thaning & Appel / J. Jørgensen, 1911. First edition.
A fine copy of Niels Bohr's doctorial thesis. “Bohr’s doctoral dissertation, Studier over metallernes elektrontheori(1911), was a purely theoretical work that again exhibited a mastery of the vast subject he had chosen, the electron theory of metals. This theory, which pictures the metallic state as a gas of electrons moving more or less freely in the potential created by the positively charged atoms disposed in a regular lattice, accounted qualitatively for the most varied properties of metals; but it ran into many difficulties as soon as a quantitative treatment was attempted on the basis of then accepted principles of classical electrodynamics.
“In order to throw light on the nature of these difficulties, Bohr developed general methods allowing him to derive the main features of the phenomena from the fundamental assumptions in a very direct way. He could thus clearly exhibit the fundamental nature of the failures of the theory, which were in fact attributed to an insufficiency of the classical principles themselves. Thus, he showed that the magnetic properties of the metals could in no way be derived from a consistent application of these principles. The rigor of his analysis gave him, at this early stage, the firm conviction of the necessity of a radical departure from classical electrodynamics for the description of atomic phenomena.” (Rosenfel in DSB).
Bohr’s “thesis had pushed him to the outer frontier of classical physics. It could just be that these experiences encouraged him to push into areas beyond, into the mysteries of quantum physics, as he was soon to do” (Abraham Pais).
Rosenfeld, Bohr Bibliography, no. 3; Dictionary of Scientific Biography II, pp. 239; Pais, Niels Bohr’s Times, p. 111; see pp. 107-11)
Large 8vo (256 x 180 mm), original printed wrappers, upper right corner very slightly bumped, short closed tear to the lower left corner, very faint rubber stamp (unreadable) to the front wrapper, old price to the half tile, the two announcements of the defense laid in - in all a fine copy in its original state.