Isotherms, Rainfall, Snowfall and Isobars (1906)

Natural Resources Canada

Contained within the 1st Edition (1906) of the Atlas of Canada is a plate that shows 11 maps. Two maps at the top of this plate presenting isothermal lines for summer and for the entire year. The isotherms for summer display the great northern "loop" of the summer isotherm of 55 degrees Fahrenheit, which make cultivation of cereals possible. The annual isothermal lines follow an easterly and Westerly direction which would obscure the beneficial effect indicated by the summer isotherms. The next four maps show precipitation and snowfall for Eastern and Western Canada in inches. The remaining five maps show isobaric lines. One map shows the annual average, while the other four cover seasons (January-March, April-June, July-September, and October-December). Barometric pressure is measured in inches of mercury. In some of the maps, major railway systems are shown.

Page Size: 17.25 x 24.25 in (433 x 613 mm)

Buy this map on or

About MapSherpa:

MapSherpa is a modern Map Distributor that brings high quality international map publisher content to market through secure print on demand technology.


1953 Bromley Road

Ottawa, Ontario K2A 1C3



Tel: +1 613.565.5056

Contact us

Privacy Statement | © 2019 by MapSherpa