26 



PROBLEMS OF LAKE BIOLOGY 



Powers, E. B., ct al. 1938. The Eolation of 

 Ecspivation of Fishes to Environment. XII. 

 Carbon Dioxide Tension as a Factor in Various 

 Physiological Eespiratory Eesponses in Certain 

 Fresh- Water Fishes. J. Term. Acad. ScL, 13. 



Eawson, D. S. 1930. The Bottom Fauna of Lake 

 Simcoe and Its Eole in the Ecology of the Lake. 

 Pub. Out. Finh. Hcs. Lab., 40. 



. 1934. Productivity Studies in Lakes of 



the Kamloops Eegion, British Columbia. Bull. 

 Biol. Bd. Can., 42. 



. 1936. Physical and Chemical Studies in 



Lakes of the Prince Albert Park, Saskatchewan. 

 /. Biol. Bd. Can., 2. 



EiCE, T. B. 1916. A Study of the Eelations Be- 

 tween Plant Growth and Combined Nitrogen in 

 Winona Lake. Pror. Ind. Acad. Sci. 



EiCKER, W. E. 1934. A Critical Discussion of 

 Various Measures of Oxygen Saturation in Lakes. 

 Ecology, 15. 



. 1937. Physical and Chemical Character- 

 istics of Cultus Lake, British Columbia. J. Biol. 

 Bd. Can., 3. 



EOSSOLIMO, L. and Kusnezowa, S. 1934. Die 

 Boden-Gasausscheidung als Faktor des Sauerstoff- 

 haushaltes der Seen. Arb. Limnol. Sta. Kossino., 

 17. 



EUTTNER, F. 1937. Limnologische Studien an 

 einigen Seen der Ostalpen. Arcli. Hydrob., 32. 



SCHREIBER, E. 1927. Die Eeinkultur von marinem 

 Phytoplankton. Wi.s.sen^cli. Mecresunters. N.F., 

 16.' 



ScHWABE, G. H. 1937. Zur okologischen Bedeut- 

 ung des Temperaturfaktors im Wasserkorper. 

 Arch. Hydrob., 31. 



Scott, W. 1931. Investigations of Indiana Lakes. 

 III. The Lakes of Northeastern Indiana. Div. 

 Fish and Game Dept. Conservation, Ind. 



Smith, F. 1925. Variation in the Maximum Depth 

 at Which Fish Can Live During Summer in a 

 Moderately Deep Lake with a Thermocline. Bull. 

 V. S. Bur. Fish., 41. 



Str0xM, K. M. 1928. Eecent Advances in Limnol- 

 ogy. Proc. Linnaean Soc. London. 



. 1930. Limnological Observations on 



Norwegian Lakes. Arch. Hydrob., 21. 



. 1931. A Physiographical and Biological 



Study of a Mountain Lake. Arch. Hydrob., 22. 



. 1933. Nutrition of Algae. Arch. 



Hydrob., 25. 



1938. Norwegian Mountain Lakes. 



Arch. Hydrob., 33. 



Thienemann, a. 1927. Der Bau des Seebeckens 

 in seiner Bedeutung fiir den Ablauf des Lebens 

 im See. Verh. Zool. Bot. Ges., 77. 



. 1928. Der Sauerstoff im eutrophen und 



oligotrophen See. Die Binnengewiisser, 4, Stutt- 

 gart. 



-. 1933. Sind die grossen Alpenseen alkali- 



troph? Arch. Hydrob., 25. 



Varga, L. 1934. Wandelweg und heutiger Stand 

 der Putter 'sclien Theorie. Arch. Hydrob., 26. 



Welch, P. S. 1935. Limnology. McGraw-Hill, 

 N. Y. 



Welch, P. S. and Eggleton, F. E. 1932. Limno- 

 logical Investigations on Northern Michigan 

 Lakes. II. A Further Study of Depression Indi- 

 viduality in Douglas Lake. Mich. Acad. Sci., 15. 



. 1935. Additional Data on Submerged 



Depression Individuality in Douglas Lake, Michi- 

 gan. Mich. Acad. Sci., 20. 



Whitney, L. V. 1938. Microstratification of In- 

 land Lakes. Trans. Wis. Acad. Sci., 31. 



Wiebe, A. H. 1931a. Notes on the Exposure of 

 Several Species of Fish to Sudden Changes in the 

 Hydrogen-ion Concentration of the Water and to 

 an Atmosphere of Pure Oxygen. Trans. Am. 

 Fish. Soc, 61. 



. 1931b. Dissolved Phosphorus and liior- 



ganic Nitrogen in Water of the Mississippi Eiver. 

 Science, 73 : 652. 



YOSHIMURA, S. 1932. Calcium in Solution in the 

 Lake Waters of Japan. Jap. J. Geol. Geog., ]0. 



. 1935. A Subdivision of the Stagnation 



Periods of Fresh-water Lakes. Arch. Hydrob., 

 28. 



