REVIEW OF THE LITERATURE 11 



Baylis and Gerstein (1929) reported the effects of plankton on the 

 filtration of lake water, and discussed methods of counting such 

 organisms. Thirty-nine genera, mainly Bacillariophyceae and Chloro- 

 phyceae, are mentioned. 



Ohashi (1930) made a cytological study of the genus Oedogonium, 

 using an undetermined species collected at Jackson Park, Chicago, 

 and Oedogonium grande Kuetz. collected in a swamp at Palos Park 

 near Chicago. 



Richardson (1930) reported results of experimentation with fish 

 culture in balanced aquaria. Plants collected at Havana, Mason 

 County, and used in the experiments, included 3 genera and 2 species 

 of algae. 



Williams, e/ a/. (1931), studied the effects of commerical fertilizers 

 on sugar utilization in the genus Spirogyra. Experimental material 

 consisted of Spirogyra porticalis (Muell.) Cleve, obtained from a small 

 lake near Urbana, Champaign County. 



