ORGANIZATION OF THE UNITED STATES DEPARTMENT OF AGRICULTURE WHEN THIS PUBLICATION WAS LAST PRINTED Secretary of Agriculture ARTHUR M. HYDE. Assistant Secretary R. W. DUNLAP. Director of Scientific Work A. F. WOODS. Director of Regulatory Work *. WALTER G. CAMPBELL. Director of Extension Work C. W. WARBURTON. Director of Personnel and Business Adminis- W. W. STOCKBERGER.

tration. Director of Information- M. S. EISENHOWER. Solicitor E. L. MARSHALL.

Weather Bureau CHARLES F. MARVIN, Chief. Bureau of Animal Industry JOHN R. MOHLER, Chief. Bureau of Dairy Industry O.E. REED , Chief. Bureau of Plant Industry WILLIAM A. TAYLOR, Chief. Forest Service ; R. Y. STUART, Chief. Bureau of Chemistry and Soils H. G. KNIGHT, Chief. Bureau of Entomology C. L. MARLATT, Chief. Bureau of Biological Survey PAUL G. REDINGTON, Chief. Bureau of Public Roads THOMAS H. MACDONALD, Chief. Bureau of Agricultural Economics NILS A. OLSEN, Chief. Bureau of Home Economics LOUISE STANLEY, Chief. Plant Quarantine and Control Administration- LEE A. STRONG, Chief. Grain Futures Administration J. W. T. DUVEL, Chief. Food and Drug Administration WALTER G. CAMPBELL, Director of Regulatory Worky in Charge. Office of Experiment Stations , Chief. Office of Cooperative Extension Work C. B. SMITH, Chief. Library CLARIBEL R. BARNETT, Librarian.

22 U.S. GOVERNMENT PRINTING OFFICE: 1930