Word: positronic
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Dates: during 1933-1933
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Cambridge's "positron" is a particle of positive electricity no heavier than the particle of negative electricity called the electron. Protons, heretofore considered the smallest unit of positive electricity, weigh 1,850 times as much as electrons. Cambridge's Paul Adrien Maurice Dirac long ago declared that mathematical necessities require the existence of light-weight protons. Last year Caltech's Carl David Anderson noticed some ion tracks which implied impacts from Theorist Dirac's light protons. Before the Royal Society last fortnight, Dr. P. M. S. Blackett, 35, tall, pale member of Lord Rutherford...