On the Decrease of Velocity of Swiftly Moving Electrified Particles in Passing Through Matter(86 views)
Description: FIRST EDITION OFFPRINT, INSCRIBED BY BOHR: "With the author's compliments". "On the Decrease of Velocity of Swiftly Moving Electrified Particles in Passing Through Matter" is the continuation of Bohr's important work on the behavior of alpha particles passing through a material medium. In an earlier 1913 paper ("On the Theory of the Decrease of Velocity of Moving Electrified Particles on Passing Through Matter") Bohr studied the energy loss of alpha particles through ionization and was able to "express the rate of energy loss in terms of the velocity by a much more accurate formula than had so far been achieved?a formula, in fact, to which modern quantum mechanics adds only nonessential refinements? (DSB). In this1915 follow-up paper, Bohr "includes the influence of effects due to relativity and to straggling (that is, the fluctuations in energy and in range of individual particles)" (Pais, 128). With ownership signature on front wrapper of Harold S. King. King was a chemist who studied and worked at Harvard and later taught at Dalhousie University, Nova Scotia. He was the son of E.S. King, a noted Harvard astronomer. Offprint from: The Philosophical Magazine, vol xxx, October 1915, pp. 581-612. Octavo, original wrappers. Extremely fragile wrappers with moderate chipping. Spine perished with front and rear wrappers detached. Text fine. Note: A custom cloth box is available for an additional $250.
Artist or Maker: BOHR, NIELS