Contained within the 2nd Edition (1915) of the Atlas of Canada is a plate comprised of 11 maps. The two maps at the top of the plate show isothermal lines for summer and for the entire year, with temperature units measured in Fahrenheit. 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 display isobaric lines (i.e. barometric pressure). One map shows the annual average, while the other four maps cover the 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.