"In later years, the advent of a new elementary particle would scarcely ruffle the intellectual sensibilities of the world's physicists; in 1932, Anderson's announcement of the ran into a wall of resistance. If the had resolved many long-standing difficulties of nuclear theory, the positron seemed to complicate matters. It is said that Neils Bohr dismissed Anderson's finding out of hand, and when in the fall of 1932 Millikan discussed the positron in a lecture at the Cavendish, various members of the audience suggested that Anderson had doubtless become tangled in some fundamental interpretive error. But not all of Rutherford's physicists were prepared to ignore Anderson's claims, especially not the resident Cavendish expert on s, Patrick M. S. Blackett."