Index Iron works 2 need for pig iron, RTP3 161 320 2 furnace at Providence, RTP3 161 179–180 1 lack of ore, RTP3 179 1 RTP tours furnaces, RTP3 206n.2 1 air furnace at New York, RTP3 215 1 iron sought, RTP3 331. RTP3 71n.8