MacDonald, Alexander Forsyth, 1897-1965 · Port Credit, Ont. : Aviation Service Corporation · leaf 56
Fig. 15. Line Squall. AIR MASSES In the past, the weatherman based his predictionson the weather mainly upon the existence and move-ment of high and low pressure areas and the wind andweather systems which are associated with them. To-day, the whole system of weather forecasting is basedupon the…
Airplanes
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