INFORMATION FROM THE ADVERTISEMENT PAGES

Anything up to 80 per cent of a technical journal to‐day consists of advertisements. The advertising pages are often cunningly woven among the others to increase their chance of being read, and it is a fact that many readers are as likely to be arrested by an advertisement as by a feature in the text. Abstractors, however, or information staff scanning a periodical for a purpose, may be inclined to regard this 80 per cent advertising as a bore, grudgingly admitting responsibility for trade announcements of plant, apparatus, materials, and the books and other publications listed, but giving other publicity scant attention.