390 Wisconsin Academy of Sciences , Arts , and Letters. 
LITERATURE CITED. 
Birge ’97. Plankton Studies on Lake Mendota, II. The 
Crustacea of the plankton, July, 1894-Dec., 1896. E. 
A. Birge. Trans. Wis. Acad, of Sciences, Arts, and 
Letters, Yol. XI, pp. 274-448. Madison, 1897. 
Birge TO. An unregarded factor in lake temperatures. 
E. A. Birge. Trans. Wis. Acad, of Sciences. Vol. XVI, 
pp. 989-1004. Madison, 1910. 
Birge T5. The heat budgets of American and European 
lakes. E. A. Birge. Trans. Wis. Acad, of Sciences. 
Vol. XVIII, part I, pp. 1-47. Madison, 1915. 
Birge and Juday T4. A limnological study of the Finger 
Lakes of New York. E. A. Birge and C. Juday. Bull. 
Bureau of Fisheries. Vol. XXXII, 1912, pp. 526-610. 
Washington, D. C., 1914. 
Juday T4. The inland lakes of Wisconsin. Hydrography and 
Morphometry. Chancey Juday. Bull. Wis. Geol. and 
Nat. Hist. Survey, No. XXVII, Madison, 1914. 
Schmidt T5. Uber die Energiegehalt der Seen. Wilhelm 
Schmidt. Int. Rev. der Gesamten Hydrobiologie und 
Hydrographie. Vol. VII, pp. 1-25. Leipzig, 1915. 
Whipple ? 95. Some observations on the temperature of 
surface waters, etc. G. C. Whipple. Journal N. E. 
Water Works Association. Vol. IX, pp. 202-222. Boston, 
1895. 
