Table 1. Turbidities in parts per million, transparencies in inches (Secchi 

 Disc) J size and depths of farm ponds used. 



1 Represent readings through two years for all ponds except Nos. 1, 

 and 33, which were immt used in 1955, 



2 Represent averages through 1954 only. 



10, 15, 25 



