Bulu U. S. B. F., 1921-22. 



Fig. 5S.— Improve: 1 float employed in experiments in mussel culture showing one ol crates on "deck" opposite 



11 - berth. 



Fig. 59.— iJanie float as in fig. 58 anchored in the river showing three crates in position supported by adjustable 

 iron hangers which are visible above the float. 



