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Format

JPG

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file-only

Publisher-reported update

2017-01-26

Contained within the 3rd Edition (1957) of the Atlas of Canada is a map that shows the typical weather situations by means of four surface weather maps: for February 18th, circa 1954; April 19th, circa 1955; July 3rd, circa 1955; and October 12th, circa 1954. All maps are based on data of 1:30 p.m. Eastern Standard Time for the afore-mentioned dates. There are two small inset maps: one shows air masses and the mean position of fronts in winter, the other shows the same concepts for summer.

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