FOOTNOTES:
[1] Rep. of U. S. Geolog. Survey for 1916.
[2] “The Imperial Valley and Salton Sink,” by H. T. Cory, formerly Chief Engineer of the California Development Co., p. 49; San Francisco 1915 (embodying paper read Jan. 8, 1913, before the Amer. Soc. of Civil Engineers and published in its Transactions as “Paper 1270”).