LEGAL NOTICE This report was prepared as an account of Government sponsored work. Nesther (he United States, nor the Commission, nor any person acting on behalf of the Commission: A. Makes any warranty or representation, expressed of implied, with reapect to the accuracy, completeness, or usefulness of the information contained in this report, of that the use of any information, apparatus, method, or process disclosed in this report may not infringe privately owned rights; or B. Assumes any liabilities with respect to the use of, or for damages resulting from the use of any information, apparatus, method, or process disclosed in this report. As used in the above, “person acting on behalf of the Commission” includes any eimployee or contractor of the Commission, or employce of such contractor, to the extent that such employee or contractor of the Commission, or cinplovee of such contractor prepares, disseminates, or provides access to, any information pursuant to bis employ - ment or contract with the Commission, or his ciplovment with such contractor PRINTED IN USA PRICE $2.00 Available from the Office of Technical Services Department of Commerce Washington 25, D.C. May 1963 1600 copies