When an encyclopaedia is published in instalments, the later volumes will always contain items which were certainly not included in the original schedule. An example which reflects high credit on the editor’s ingenuity is to be found in the first volume of the Schweizer Lexikon, which came out in the autumn of 1945. Look up ‘Atom bomb’ and you will see that the leads have been deleted from the column so as to gain an additional line for ‘Atom bomb, see Nuclear Physics’!
S. H. Steinberg, ‘Encyclopaedias’, Signature, vol. 12 (1951), p. 20