National Geographic : 1939 May
THE NATIONAL GEOGRAPHIC MAGAZINE ART STUDENTS APPLY BEAUTY TREATMENTS TO TEXTILES With stencils and special dye compounds, adept hands transform ordinary cotton cloth into gay napkins, card table covers, tea sets, scarfs, and aprons at the Memphis Cotton Carnival. "PIG" INSPECTION IN DUCKTOWN BASIN More than a half million tons of copper ore are mined here annually. The molten metal pouring from the ladle in this Copperhill mill is 99 per cent pure. Gold is one of the "impurities." Waste fumes which formerly destroyed vegetation in the basin now are the source of sulphuric acid.