126 



Kansas Academij of Science. 



Chlorojihj/ccie : 



Cladoplioia . . . . 

 riosteriuin . . . . 

 Coelastrum . . . . 

 Cosmarium . . . . 

 Dictyosphaerium 

 Draparnaldia . . 

 Miei'ospora . . . . 

 Microthamium 



Mougeotia 



Oedogonium . . . 



Paudorina 



Pediastrum . . . . 



7 

 4 

 3 

 11 

 5 

 1 

 4 

 1 

 6 

 6 



Raphidium 17 



Scenedesmus . 

 Spirogyra ... 

 Stigeoclonium 

 Tetraspora . . 

 Haematococcus 



Ulothrix 



Zygnema 



10 

 7 

 3 



3 

 1 



1 

 1 



Bacillarieie : 



Amphora 10 



Cymbella 2.3 



Cocconeis 1 



Encyonema 1 



Pragillaria 4 



Goraphonenia 7 



Melosiia 3 



Navicula 85 



Nitzschia 8 



Pleurosigma 11 



Stauroneis 1 



Siirirella 3 



Synedra 25 



Total 182 



Grand total 486 



Total 115 



Out of the many cases handled by the workers in the water 

 laboratory several interesting ones, showing the value of the 

 copper method of removing algae from the reservoirs in Kan- 

 sas, will be briefly mentioned below. 



In June, 1916, the water at Horton, Kan., was in "bad" con- 

 dition, according to Superintendent W. W. Wood. The author 

 made a trip to Horton and found the water had a very dis- 

 agreeable odor and a dark reddish-brown color. The reservoir 

 was found to be covered with a decaying mat of Clado- 

 phora, Spirogyra, Zygnema, Mougeotia, Anahsena, Closterium, 

 Euglena and Characium. The odor from the reservoir was due 

 to these decaying forms, likewise the color. The settling basin 

 showed a count of sixty-eight organisms per cubic centimeter 

 of water, forty-nine of which were Anahsena. The basin, with 

 a capacity of 600,000 gallons of water, was treated with two 

 and one-half pounds of CuSO^ and allowed to stand for twenty- 

 four hours. The supply was changed from the infested reser- 

 voir to the creek, whose overflow supplies the reservoir and 

 whose waters at that time were comparatively free from algse. 

 In forty-eight hours all odors and color had disappeared. 



In the fall of 1916 the Olathe water system was infested 

 with extremely heavy growths of Conferva. Much of the dense 

 entaglement was raked out upon the banks and the waters 

 were treated at the rate of six pounds of CUSO4 to a million 

 gallons of water. The water was usable within three days. 



J 



