'• It will be remembered that som.e_ years agef, when the rain-making experiments were being carried out at Oamaru, the sound ,of the explosions was audible as far away as Canterbury, but at places much nearer to Oamaru they were not heard at all. The English meteorological authority, SymonV Meteorological Magazine, reports a- similar phenomenon during the recent great munitions explosion in 'Bondon. Mr. 0. ■ Dawson, "of Birmingham, writing in the magazine, says that there were two distinct sound areas, one including the centre of sound and the other lying some hundreds, of miles in the. north", and extending to Norfolk, Suffolk, and Lancashire, and to tho West of ( Nottingham. . Between these two areas there was apparently 'a zone of silence occupying a large part, of Essex and Sussex, and extending over half of the pountiea of .Cambridgeshire and Huntingdon and Central 'and North-amptonshh-e. . : '
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Evening Post, Volume XCIII, Issue 99, 26 April 1917, Page 5
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143Page 5 Advertisements Column 4 Evening Post, Volume XCIII, Issue 99, 26 April 1917, Page 5
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