252 BULLETIN OF THE BUREAU OF FISHERIES. 



LITERATURE CITED. 



BiRGE, Edward A. 



1915. The heat budgets of American and European Lakes. Transactions, Wisconsin Academy 



of Sciences, Arts, and Letters, VoL XVIII, pp. 1-47. Madison. 



1916. The work of the wind in warming a lake. Ibid., pp. 341-391. 

 1921. Limnological apparatus. Ibid., VoL XX (now in press). 



BiRGE, Edward A., and Chancey Juday. 



1914. A limnological study of the Finger Lakes of New York. Bulletin, U. S. Bureau of Fish 

 eries, 1912, Vol. XXXII, pp. 525-609. Washington. 

 Hamberg, Axel. 



191 1. Dichteunterschiede und Temperattirverteilung hauptsachlich der Binnenseen. Peter- 

 manns geographische Mitteilungen, Bd. 57, pp. 306-312. Gotha. 

 Henry, W. A. 



1898. Feeds and feeding. 657 pp. Published by the author, Madison, Wis. 

 Huitfeld-Kass, H. 



1905. Temperaturmessungen in dem See Mjosen und in drei anderen tiefen Norwegischen Seen. 

 Archiv for Mathematik og Naturvidenskab, Bd. XXVII, No. 2, pp. 1-6. Kristiania. 

 Juday, Chancey. 



1916. Limnological apparatus. Transactions, Wisconsin Academy of Sciences, Arts, and Letters, 

 Vol. XVIII, p. 566-592. Madison. 

 Schmidt, Wilh. 



1908. iJber die Absorption der Sonnenstrahlimg im Wasser. Sitzungsberichte der kaiserlichen 

 Akademie der Wissenschaften, Bd. CXVII, pp. 237-253. Wien. 



