100 YEARS AGO

摘要

In a letter in Nature (August 2, 1906) I gave an account of some experiments which I considered proved that the a particle as initially expelled is not charged... But it is clear that if, as Rutherford considers probable, the a particle carries a multiple charge, the results I published do not by themselves suffice... I had hoped long ere this to submit this point to an experimental test, which is simple enough to do by varying the strength of the field.