The Algx of Ka)isas Kcscrroiis. 127 



Russell, whose impounding reservoir has a capacity of 

 39,000,000 gallons, was greatly troubled in September, 1916, 

 with heavy growths of Anahmna, Coferva and Cladophora. 

 The lowering waters had left a carpet of decaying algse about 

 the edge. The reservoir was treated with 50 pounds of the 

 copper salt, and 100 more pounds were sprayed about the 

 banks. No further trouble was reported. 



In March, 1917, Burlington reported a very "bad taste" to 

 the city water, and extremely offensive odors rising especially 

 from the filter beds. Analyses showed the filters to be covered 

 with numerous Syuedra, Naviciila, CJilaruijdomonas and Clath- 

 )-0( i/stis. The filters were washed, and about a foot of water, to 

 which one pound of CuSO.j had been added, was left standing in 

 each. The basins were treated with eight pounds to the million 

 gallons. The filters, after standing for eight hours, were 

 drained into the sewer, and the water now let in from the 

 basin and filtered was in good condition. 



Occasionally difficulty M^hich seems to be due to the algas 

 may be caused by the growth of small animals. A few cases 

 in our state where water from the basins and filters has given 

 off very foul odors have been traced to this cause. Early in 

 May, 1917, Lyndon reported a very offensive fishy odor coming 

 from their settling basin and filter. The walls were covered 

 with a brownish-gray growth much resembling masses of 

 roots. A sample of this material analyzed in the laboratory 

 proved to be a Polyozoa, minute animals forming mosslike 

 clusters. These small animals when in a state of decomposi- 

 tion give oft' an odor much the same as comes from a stagnant 

 fish pond. The treatment advised was purely a mechanical one. 

 The walls were scraped and the filters carefully cleaned. This 

 seemed quickly to remove all the difficulty as to odors. In 

 January, 1917, Kansas City complained of the heavy growths 

 and bad fishy odors in their basins. The infesting form was 

 found to be a Polyozoan. In February, 1917, great quantities 

 of Vorticella were found to be the chief trouble causers at the 

 State Hospital at Osawatomie. This small protozoan was 

 successfully eradicated with copper sulfate. 



SUMMARY. 



Although there were but 13 genera of diatoms classified, 

 they appeared 182 times, while the 23 genera of Chlorophycese, 

 of which there were 55 species, were found only 114 times. 



