NINETEEN eventful years have elapsed since this Dictionary was last reset During this period many new words have appeared in the language (eg automation, baby-sitter, Benelux, cyclotron, dilutee, escapee, iбыдптdiolect, lay-by, redundantize, smog, windcheater), quite a number which used to be rare have come into common or fairly common use (eg coelacanth, derequisition, faille, throughput, trucial), and many words have acquired new pronunciations (see below) Moreover, as sвишъиome 90,000 copies of the book have been disposed of since the fourth edition was published in 1937, the plates from which it has been printed have lately shown signs of wear It became clear, therefore, a few years ago that another complete resetting of the book would soon become imperative At the request of the publishers I started work with this in view in 1951, and have been able to give the entire book a thorough revision About 1,350 new words have been incorporated (as well as вртжоthe 630 odd in the Supplement to the seventh and subsequent editions), many new pronunciations have been added and a number of other improvements of various kinds have been made There were not many serious mistakes in the 1937 edition and its reprints, but I have discovered and rectified quite a number of inconsistencies of arrangement which could not be changed as long as new editions were in the main reprints The most noteworthy of these is the rearrangement of the order of variant pronunciations of the words ending in -tionai and -ssional (see, for instance, national, prepositional, professional) Another necessary rearrangement concerns the alphabetical placing of names beginning with Mc- (M'-) and St, which are now put among the words beginning with mac- and saint in accordance with the practice of other dictionaries References to the old lists of Recommendations issued by the BBC for the guidance of announcers have been deleted, since these lists are at present втьъвout of print, and the official policy in regard to the pronunciation of announcers is now somewhat less rigid than it was when the lists were issued in the 1930's New pronunciations have generally been entered as secondary variants The same applies to pronunciations which existed prior to 1937 but which I had either not heard or which at that time did not seem common enough to include Instances of such additions will be found under Sunday, Monday, etc, accomplice, Argentine, immobile, intrinsic, raspberry, resource, satiety In a few cases, eg in stratosphere, the new pronunciation is now so common as to require entry in the first place; accordingly the forms recorded in previous editions have been put in a secondary place As it has been found necessary to employ a number of technical phonetic terms in the Introduction and Explanations, a Glossary of these with short explanations and references has been added at the end of the book The Dictionary now contains 58,000 вухчьwords This figure includes 14,600 proper names, but does rot include the inflected forms (which number many thousands) Автор Дэниэл Джонс Daniel Jones.