Sirs, South Crillon Glacier

On p. 48 of No. 2 of the Journal, under the heading “Variation and Flow Rate,” I note that some measure of weight is given to the observations on the South Crillon Glacier. I recall clearly that when I looked at the illustration in the National Geographical Magazine of the area where the observations were made, I inclined to discount their value because the ice was cut by great crevasses relatively close together. Surely the presence of such crevasses proves that the rate of surface movement has some measure of irregularity.

Don Munday

North Vancouver, B.C. 26 July 1947.