IN NATURE of Nov. 29, 1930, p. 847, Col. E. Gold, discussing upper air conditions, states that the note under “Historic Natural Events”, in NATURE of Oct. 18, 1930, p. 633, gives a misleading impression of the cause of the high winds at an altitude of 10,000–20,000 feet on Oct. 19–20, 1917. A true explanation of the air structure which led to the loss of four German airships is of some importance, though not bearing directly on the loss of the R101. In “Aids to Forecasting” (M.O. Geophysical Memoirs, No. 16) types IV. and VI. are listed for Oct. 19 and 20, 1917. The former shows ‘lows’ north-west and north-east of the British Isles, and the latter an advancing ‘low’ with characteristic pressure gradients. For Oct. 21 the type indicates a deep V. low.
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MCADIE, A. Meteorological Conditions during the Air Raid on London, Oct. 19–20, 1917. Nature 127, 198 (1931). https://doi.org/10.1038/127198a0