Starch from sweet potatoes is latest. Washington D.C. June 28. After three years of chemical research and commercial starch production, the Bureau of Chemistry and Soils of the U.S. Department of Agriculture has discovered a method of manufacturing starch from sweet potatoes; the resultant product beign used in cotton mills, adhesive factories, commercial laundries and in the making of "sticky" for postage stamps. The new government sweet potato starch factory is located at Laurel, Miss. shown in this photograph is Dr. Henry G. Knight, Cheif of the Bureau of Chemistry and Soils, is in charge of the experts responsible for haloing the common vegetable. 6/28/37