National Geographic : 1940 Nov
Photograph by William E. Rudolph Ore Cars Glide Overhead as a Catavi Housewife Shops Tin controls the destinies of the town, high in the Andes, where the huge Llallagua mine is located (pages 664-5). Nearly all inhabitants are Bolivian Indians, inured to the cold in the high altitude. Photograph by Edwin L.Wisherd Shiny Platesfor Tin Cans Must Be Perfect An inspector looks for flaws intin plate at aMcKeesport, Pennsylvania, mill. So-called "tin" cans are 98/ percent steel, covered with a1/percent protective coating of tin (pages 666, 680, 682, 683).