. The Bell System technical journal . Fig. 3—Part of Stetters apparatus for studying transmutation. they have when expelled, and the plentifulness of the expulsions, variesnotably from element to element. This suggests that they are con-stituents common to all elements, though the manner in which theyare bound into the atomic structure differs from one to to our knowledge of the astronomy of the atom, the nucleusis the only part where they can be. Moreover, though the masses ofnuclei generally are not exactly integer multiples of the mass of the CONTEMPORARY ADVANCES IN PHYSI
. The Bell System technical journal . Fig. 3—Part of Stetters apparatus for studying transmutation. they have when expelled, and the plentifulness of the expulsions, variesnotably from element to element. This suggests that they are con-stituents common to all elements, though the manner in which theyare bound into the atomic structure differs from one to to our knowledge of the astronomy of the atom, the nucleusis the only part where they can be. Moreover, though the masses ofnuclei generally are not exactly integer multiples of the mass of the CONTEMPORARY ADVANCES IN PHYSICS 639 proton, this is so nearly the rule as to suggest very forcibly that themajor part of every nucleus consists of protons. All this strengthensthe belief that in witnessing these flashes of long-range particles oneis witnessing the signs of transmutation. The next step, then, consists in finding which of the elements maybe transmutable. I repeat that for the present, a strict assessment ofthe evidence permits us to proclaim a t
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