M. R. MALINOW, J. D. HILL, M. LEES, W. P. MCNULTY AND A. J. OCHSNER III 
117 
ACKNOWLEDGMENTS 
We gratefully acknowledge the aid of Dr. C. 
W. de Lannoy, Jr. and Dr. Aleksander Knezev- 
ich in helping to devise some of the techniques 
of the earlier experiments. The authors are also 
indebted to Mr. Wm. Baughman, Mr. P. Madi- 
gan, and Mr. J. Lindsley for technical assist- 
ance ; to Mr. D. Lindgren for writing the com- 
puter program, and Mr. J. Ito for illustrations. 
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