XXth century_physics

"I am beginning to think that the central core is
negatively charged, for otherwise the law of
absorption for beta rays would be very different
from that observed...”
Letter to William Henry Bragg, February 9, 1911
"The scattering of the electrified particles is considered for
a type of atom which consists of a central electric charge
concentrated at a point and surrounded by a uniform spherical
distribution of opposite electricity equal in amount."
Abstract of a paper read before the Society on March 7, 1911.
Proc. Manchester Literary and Philosophical Society, IV, 55, 18.