146 Kansas Academy of Science. 



Table II. 

 Quantity of copper sulphate required for different organisms. 



Parts per Pounds per million 



Organisms. million. gallons of water. 



BacUlarieae. 



.Asterionella . 10 0.8 



Pragilaria 0.25 2.1 



Melosira 0.30 2.5 



Synedra 1.00 8.3 



Navicula 0.07 0.6 



l'la;iellata. 



Euglena 1.00 8.3 



Dinobryon 0.30 2.5 



Ali/xophi/cece. 



Anabaena 0.09 . 75 



Aphanizomenon 0.15 1.2 



Clathrocystis 0.10 0.8 



Oscillatoria . 10 to .4 . 8 to 3 . 8 



Chlornphiiceev. 



Cladophora 1 . 00 8.3 



Conferva . 40 to 2 3 . 3 to 16 



Chlamydomonas 0.50 4.2 



Draparnaldia 0.30 2.5 



Microspora . 40 3.3 



Scenedesmus 0.30 2.5 



Spirogyra . 05 to .3 . 4 to 2 . 5 



Raphidium 0.30 2.5 



Ulothrix 0.20 1.7 



Zygnema 0.70 5.8 



Then, too, the odors of the algae are liberated by this treatment. Many 

 of the superintendents of water works of the southern part of Kansas 

 use the aerating system to free the water from the sulphur odor. 



S. T. Powell (17) in 1914 reports a ready removal of certain kinds 

 of algae from drinking water by direct oxidation with ozone, but from 

 a practical point of view this method has never been developed. 



Throughout the country much work is being done upon the algae with 

 special attention to the control of growths in water supplies. With the 

 increasing population will come a larger number of surface water sup- 

 plies, necessitating more attention on the part of the sanitary engineers 

 to the pollution of the water by algae. 



METHODS. 



The cities of Kansas that furnish surface water to the public are 

 compelled by the rules and regulations of the State Board of Health, 

 1915 (16), to send samples of water collected weekly to be analyzed in 

 the water and sewage laboratory at Lawrence. There are now forty- 

 three such water supplies in the state distributed as appears on the 

 map, plate I. From the reservoirs and basins of the water supplies of 

 these cities the material for this report was obtained. Collections were 

 made in the summer and winter of 1915 and the spring, summer and 

 winter of 1916. This checking of each reservoir five times should bring 

 out any changes due to differences in the seasons and gives us a more 

 complete record on the flora of each reservoir. 



The bottles used in collecting the algae were large-mouthed, glass- 

 stoppered, 100 cubic centimeter bottles, usually filled about one-half full 

 of a two per cent solution of formalin, and bearing the following inscrip- 

 tion: "Collect green moss or slime from settling basin. Look carefully 

 near the walls. Do not pour out the liquid in this bottle, but collect slime 

 with a dipper or hand and pour into the bottle." The bottles were 



