22 5 Canadian Arctic Expedition, 1918-18 
Puate IV. 
Fig. 1. Temporary pools in swamp, fed from snow drifts. Bernard harbour, Northwest 
Territories, July 2, 1915. Photo by F. Johansen. 
Fig. 2. Valley of Firth river, Alaska-Yukon boundary, showing ponds and flood plain ice+ 
Photograph by International Boundary survey, 141st Meridian, 1912. 
