Rutherford's article on the scattering of alpha particles
The scattering of alpha and beta particles by matter
and the structure of the atom,
Philosophical Magazine, volume 21 (1911),
pages 669-688.
In this paper Rutherford describes and explains the experiments
which led him to formulate the
`planetary theory' of atoms, as opposed to the
`plum pudding theory' then commonly accepted.