(Text Page to) (23) Frost : Mean date of the first occurrence of a temperature of 32˚F fahrenheit in fall -- Mean date of the last occurrence of a temperature of 32˚F fahrenheit in spring -- Mean annual frost-free period. Compiled from information supplied by the Meteorological Division, Department of Transport. (Canada Department of Mines and Technical Surveys.)

• Main Authors: Canada. Department of Mines and Technical Surveys, Nicholson, N. L. (Norman Leon), Comtois, Paul
• Format: Text
• Language: unknown
• Published: Department of Mines and Technical Surveys, Geographical Branch 1958
• Subjects: Climate; Weather; Data Visualization; Newfoundland
• Online Access: https://www.davidrumsey.com/luna/servlet/detail/RUMSEY~8~1~323189~90092285; https://media.davidrumsey.com/MediaManager/srvr?mediafile=/Size4/RUMSEY~8~1/185/14001051.jpg

Descriptive text on verso of (23) Frost: The maps on this plate are based on the occurence of a temperature of 32˚F or lower in a standard thermometer shelter at a level of four feet above the ground . First edition was in 1906 (see our 1645.000); second edition 1915 (1646.000). The title page of this edition is dated 1957 but the Foreword is dated 1958, as well as the maps on plates 91, 99 and 110. Atlas contains 110 plates, comprising a total of 505 maps in color; additionally, these maps include 57 insets. Bound in pale green boards with burgundy lettering and spine, including spine title "Atlas Of Canada. 1957” in gilt. Loose-leaf binding allows both removal and insertion of individual maps. Inside front cover: Canadian made product by Copeland-Chatterson Limited, Brampton, Ontario. In the Foreword, Minister of Mines and Technical Surveys Paul Comtois explains, "Since the last Atlas of Canada appeared in 1915, the economy of Canada has expanded in all directions. The population of the country has doubled. Newfoundland has joined it as the tenth province, and scientific surveys have revealed to an ever increasing extent the physical nature of its land and water resources. It is, therefore, the purpose o this edition of the Atlas to present, in maps, an outline of the physical background and the economic development of the nation at mid-century and to show how these factors are interwoven to produce the fabric of the life of our people … " In the Preface, Director of Department of Mines and Technical Surveys, Geographical Branch, N.L. Nicholson continues, “ … the Atlas provides a logical story in maps which embraces historical, physical, human, economic and social and political geography. The story begins with the way in which Canada was explored and mapped. It goes on to show the basic aspects of the physical environment, such as relief and climate … “ Includes table of contents.