Others proposed even more outlandish theories about the structure of the atom,
including plum puddings, cubes, knots, and tiny planetary rings or solar systems.
Prout’s hypothesis was a persuasive approximation of reality;
Francis W. Aston was awarded the Nobel Prize in Chemistry in 1922
partly for the “whole-number rule,” a refinement of Prout’s hypothesis
that took the existence of isotopes into account.
See also in The book of science:
Readings on wikipedia: