Inscribed by Bohr: On the Quantum Theory of Radiation and the Structure [...]. + On the Decrease of Velocity of Swiftly Moving Electrified Particles [...]. (2)

Niels Bohr: On the Quantum Theory of Radiation and the Structure of the Atom. From the Philosophical Magazine, vol. xxx, September 1915. pp. (393)-415. Orig. printed orange wrapper. Inscribed by Niels Bohr to "Hr. Prof. E. Biilmann ærbødigst fra Forf." [Mr. Prof. E. Biilmann respectfully from the author]. Annotated #10 in blue crayon on frontwrapper. + On the Decrease of Velocity of Swiftly Moving Electrified Particles in Passing Through Matter. From the "Philosophical Magazine", Vol. xxx, October 1915. pp. (581)-612. Orig. printed orange wrapper, spine defective, wrappers loose. Annotated #11 in blue crayon on frontwrapper. (2)