Contained within the 2nd Edition (1915) of the Atlas of Canada is a plate that shows 9 maps. Four maps show the average possible hours of sunshine for Canada in the summer months. There is a map for the entire summer and individual maps for each of the summer months (June, July, and August. The other five maps show the number of days during the year with temperatures above 32 degrees F (0 degrees C), 40 degrees F (4.4 degrees C), 50 degrees F (10 degrees C), 60 degrees F (15.6 degrees C) and 70 degrees F (21.1 degrees C). The temperature differences are indicated with solid or dashed red lines indicating the number of days each portion of Canada will experience above temperatures indicated. In some of the maps, major railway systems are shown.