[Illustration: MINING ORE, ISLAND OF CUBA.[36] (See page 415.)] [Illustration: LOADING ORE, ISLAND OF CUBA.[36] (See page 415.)] [Illustration: PIG IRON CASTING MACHINE.[37] (See page 415.)] [Illustration: OPEN-HEARTH FURNACE STOCK YARD.[37] (See page 415.)]