426 



U. S. BUBEAU OF FISHERIES 



WATER CONDITIONS AT PAIRPORT 



The temperatures of the water at Fairport over the period of the 

 test are given in Table 4. 



Table 4. — Temperature of water at Fairport, Iowa 



I 2 3 



NUMBER OF MONTHS EXPOSED. 



Fig. 11. — Tensile strength of cotton lines exposed at Fairport, Iowa 



The water of the Mississippi River carries immense quantities of 

 suspended matter, which settled on the test lines covering them with 

 a heavy coating of mud. 



