128 Kmisas Academy of Science. 



Thirty-six species of Myxophycese, falling under 11 genera, 

 were found 167 times. There were 4 species of Heterokontse 

 and 2 Flagellata. The grand total indicates that the 51 genera 

 of algae appeared 486 times throughout the survey. Fourteen 

 species of Oscillatoria were classified. This genus was found 

 91 times, and is the most common algal form prevalent in our 

 reservoirs. The diatoms were always present, Navicula being 

 found 85 times. It is of interest to note that although the 

 specific genera varied from season to season, the number of 

 genera remained quite constant. 



The algse of our state which have been found to be the most 

 active in causing bad tastes, odors or colors in our drinking 

 water are Anabmna, Conferva, Oscillatoria, Spirogyra, Clado- 

 phora, Clathrocystis, Synedra and Navicula. Animals of the 

 Polyozoan and Protozoan groups have also been found to cause 

 these diflficulties. 



The collections of algsg during the five seasons brought out 

 no changes due to the differences in the seasons. To determine 

 whether this is due to the absence of seasonal influence on the 

 flora or to the artificial conditions of the reservoirs requres 

 data from a longer period of time than is covered by this 

 paper. 



The copper sulphate treatment for algal trouble has been 

 very successful in Kansas. 



Water and Sewage Laboratory, 



State Board of Health, Lawrence. 



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