LEGAL NOTICE This report was prepared as an account of Government sponsored work. Neither the United States, nor the Commission, nor any person acting on behalf of the Commission: A. Makes any warranty or representation, express or implied, with respect to the accuracy, completeness, or usefulness of the information contained in this report, or that the use of any information, apparatus, method,or processdisclosed in this report may not infringe privately ownedrights; or B. Assumesanyliabilities with respect to the use of, or for damagesresulting from the use of any information, apparatus, method, or processdisclosed in this report. Asused in the above “person acting on behalf of the Commission”includes any employee or contractor of the Commission to the extent that such employee or contractor prepares, handles or distributes, or provides access to, any information pursuantto his employmentor contract with the Commission. PRICE $1.00 Available from the Office of Technical Services, Department of Commerce, Washington 25, D.C. June 1958 1000 copies