56 IOWA STUDIES IN NATURAL HISTORY 



PAPERS CITED 



Birge, '10. An unregarded factor in lake temperatures. E. A. Birge. 

 Trans. Wis. Acad. Sciences, Arts, and Letters, Vol. XVI. 

 pp. 989-1004; 2 pi. Madison, 1910. 



Birge, '15. The heat budgets of American and European lakes. E. A. 

 Birge. Trans. Wis. Acad. Sciences, Arts, and Letters, Vol. 

 XVin, pp. 166-213; 3 figs. Madison, 1915. 



Birge, '16. The work of the wind in warming a lake. E. A. Birge. 

 Trans. Wis. Acad. Sciences, Arts, and Letters, Vol. XVIH, 

 pp. 341-391; 10 pi. Madison, 1916. 



Birge and Juday, '11. The inland lakes of Wisconsin; the dissolved 

 gases of the water. E. A. Birge and Chancey Juday. Bull. 

 Wis. Geol. Survey, No. XXH, pp. i-xx, 1-259; 142 figs. 

 Madison, 1911. 



Ford, '13. A topographical survey of the Spirit and Okoboji lakes 

 region. H. C. Ford. Bull. Iowa State Coll. Vol. XI, No. 6, 

 pp. 1-38; 21 cuts, 4 maps. Ames, 1913. 



Iowa, '16. Report of the state highway commission on the Iowa lakes 

 and lake beds. 1 vol. text, pp. 1-250, 109 figs; 1 vol. of 72 

 maps. Published by State. Des Moines, 1916. 



Juday, '14. The inland lakes of Wisconsin: hydrography and morpho- 

 metry. Chancey Juday. Bull. Wis. Geol. and Nat. Hist. 

 Survey, No. XXVII, pp. i-xv, 1-137; 37 maps. Madison, 

 1914. 



Tilton, '16. Records of oscillations in lake level and I'ecords of lake 

 temperatures and of meteorology secured at the Macbride 

 Lakeside Laboratory, Lake Okoboji, Iowa, July, 1915. John 

 L. Tilton. Proc. Iowa Acad. Science, Vol. XXIII, 1916, pp. 

 91-102; 4 figs. 



Tilton, '17. Second record of oscillations in lake level with record of 

 lake temperatures and meteorology secured at the Mac- 

 bride Lakeside Laboratory, Lake Okoboji, Iowa, July, 1916. 

 John L. Tilton. Proc. Iowa Acad. Science, Vol. XXIV, 1917, 

 pp. 34-41; 4 figs. 



