NOTICE This report was prepared as an account of work sponsored by the United States Government. Neither the United States nor the United States Departmentof Energy (DOE), noranyof their employees, nor any of their contractors, subcontractors, or their employees, makes any warranty, express or implied, or assumes any legalliability or responsibility for the accuracy, completeness or usefulness of any information, apparatus, productor process disclosed, or represents that its use would notinfringe privately owned rights. Printed in the United States of America Available from National Technical Information Service U.S. Department of Commerce 5285 Port Royal Road Springfield, VA 22161 Price: Printed Copy $4.50; Microfiche $3.00 April 1978 365 copies