Plankton Catcher — Bary ET AL. 
59 
and Ratings of H.M.N.Z.S. "Lachlan,” for 
facilities for additional trials at a critical stage 
of development; and the Officers and Crew 
of the Royal N. Z. Fleet Auxiliary "Tui,” 
especially for their willing cooperation and 
considerable assistance with the later more 
exacting trials. We are much indebted to Mr. 
E. J. Thornley, Senior Photographer, D.S.I.R., 
and Mr. R. Redfern, Photographer, Dominion 
Physical Laboratory, for assistance with cine 
and still photographic records; to Mr. Ken 
Gibbon, Dominion Physical Laboratory, for 
making the very useful underwater observa- 
tions; and to numerous colleagues for help 
and many ideas. 
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