Sir

Regarding Julian Schwinger's story of finding his subject by reading through the Encyclopaedia Britannica and stopping at 'Physics': an entry entitled 'Physics' appeared in every edition, beginning with the first in 1768, until the 8th (1852–60). In the 9th (1875–89) it was replaced with 'Physical Sciences' (by James Clerk Maxwell), from a paper ”Remarks on the classification of the physical sciences“. 'Physics' as an entry title did not appear in the 11th or 12th, but it did appear in the 13th (1926), and in the modern sense, whereas previously it was an alternative name for 'natural philosophy' or 'the science of nature'. The author was Robert Andrews Millikan. The 12th edition was actually the 11th with some supplementary volumes, as was the 13th.