410 



ANNUAL KEPORT SMITHSONIAN INSTITUTION, 19 39 



Sometimes fish are killed by the chemicals used in sterilization of 

 the water. Moore and Kellerman prepared the following table, 

 which shows the susceptibility of fish to the chemical, copper 

 sulfate. 



LIMITING SAFE DOSAGE OF COPPER SULFATE 



More and more in recent years, scientists and waterworks engineers 

 have become concerned with the interrelationship of microscopic 

 plants and animals and their relationship to their environment, which 

 in turn is very intimately related to our own daily life. The quest 

 for knowledge regarding these tiny organisms in our water supply 

 continues daily, and in the meantime our provision of pure water is 

 made more secure. 



BIBLIOGRAPHY 



Anonymous 



1933. Standard methods of water analysis. 7th ed., pp. lx-180. 



American Public Health Association and American Water Works. 

 BiEGE, E. A., and Juoay, C. 



1911. The inland lakes of Wisconsin. The dissolved gases of the water 

 and their biological significance. Wisconsin Geol. Nat. Hist. Surv., 

 Bull. No. 22, XX +259 pp. 

 1922. The inland lakes of Wisconsin. The plankton. I. Its quantity and 

 chemical composition. Ibid., Bull. No. 64, ix+222 pp. 

 Conger, Paul S. 



1937. Significance of shell structure in diatoms. Ann. Rep. Smithsonian 

 Inst, for 1936, pp. 325-344. 

 Godfrey, Edward S., Jr. 



1937. The protection and chlorination of public water supplies. New York 

 State Dep. Health Bull. No. 21, pp. 1-60. 

 Hale, Frank E. 



1939. The use of copper sulphate in control of microscopic organisms. 

 Phelps Dodge Refining Corp., pp. 1-43. 

 Harrington, G. E. 



1935. Interesting experiences with microorganisms in the Washington 

 water supply. Proc. 9th Ann. Conf. Maryland-Delaware Water 

 and Sewage Assoc, Annapolis, Md., pp. 74—79. 



