MacDonald, Alexander Forsyth, 1897-1965 · Port Credit, Ont. : Aviation Service Corporation · leaf 153
Thti insert weather map shows the fronialind isobaric pattern that existed 12 hours pre-vious to the lime of the large weather mapihown above. The areas where precipitationwas falling at 1:30 p. m. yesterday are cover-fd with black dot shading. A comparison>f the two maps will reveal how the…
Airplanes
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