Abstract
WITH the object of investigating the passage of waves through the atmosphere to great distances, sets of hot wire microphones are maintained at a number of stations and operated when it is announced that heavy guns are to be fired. Most of the firing which can be utilised for the purpose takes place at Woolwich, but by the courtesy of the Admiralty it is sometimes possible to take advantage of firing by H.M. ships.
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BROWNING, H., WHIPPLE, F. Air Waves of Unknown Origin. Nature 134, 532 (1934). https://doi.org/10.1038/134532a0
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DOI: https://doi.org/10.1038/134532a0
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