Shaft station two miles underground Seven 1,000 once bars of refined silver Storage bins in lead oxide plant Casting sticks of refined cadmium Underground greenhouse Ore chrushing operation End of the miner's day Loader in pillar slope Silver Valley revegetation plan Miner drilling in lead-silver ore Ore train at loading station two miles underground Particulates sketches Removing zinc in refining stage One ton lead blocks 100 pound lead pigs 25 pound caulking lead strings Leaded-zinc oxide 1200 troy ounce silver bar 2400 pound zinc block 60 pound zinc slabs 20 pound zinc alloy bars Flat zinc anodes 11 pound zinc anodes Packaged cadmium sticks and balls Sulfuric acid tank car Packaging fertilizer Several Pacific Division manufactured lead products Winter morning view of Bunker Hill Smelter Research and Analytical station Fuming Plant cooloing towers and stack at dawn. The Kellogg Tunnel Overall view of Electrolytic Zinc Plant Crane operator's view of ore preparation bins