CHAMBERS, R.G. “Shift of an Electron Interference Pattern by Enclosed Magnetic Flux” in Physical Review Letters 5 No. 1 pp. 3–5, July 1, 1960. Original wrappers, very nice condition save for some rusting to the staples. Near-fine. $225

“(Description) of the first demonstration of through observation of electron beam interference patterns where classical physics would predict none.”--David Wenner, The Physics Collection (“The Aharonov–Bohm Effect” entry. “The Aharonov–Bohm effect is a quantum mechanical phenomenon, not predicted by classical physics, that allows an electrically charged particle to be affected by an electromagnetic field even where the strength of the field is zero (e.g., when enclosed by a conductor).)

“The first claimed experimental confirmation was by Robert G. Chambers in 1960, in an electron interferometer with a magnetic field produced by a thin iron whisker, and other early work is summarized in Olariu and Popèscu (1984). However, subsequent authors questioned the validity of several of these early results because the electrons may not have been completely shielded from the magnetic fields. An early experiment in which an unambiguous Aharonov–Bohm effect was observed by completely excluding the magnetic field from the electron path (with the help of a superconducting film) was performed by Tonomura et al. in 1986.”--Wikipedia, “ Aharonov–Bohm”.