The writers thank the Ingersoll-Rand Corporation for donating the pump used in this study;
and Dr. Irwin J. Kugelman of the Center for Marine and Environmental Studies;
Lehigh University;
for supporting this study. Thanks also to E. Dittbrenner;
D;
Pense;
B;
L;
Du;
T;
Chang;
and E. Schoomer for their help with various aspects of the experimental work;