Nashua Manufacturing Co.: 124. Nasmyth, Alexander: 81, 82, 83. Nasmyth, James: 7, 8, Chapter VIII; with Maudslay, 46, 48, 87, 88; millwork, 71, 88; steam road carriage, 86; milling machine, 89; shaper, 92; method of invention, 92; steam hammer and other inventions, 93-96; study of the moon, 97; on interchangeable system of manufacture, 140-141. Nasmyth & Gaskell: 92. National Acme Manufacturing Co.: multi-spindle automatic lathe, 183, 265. Naugatuck Valley: Chapter XVIII; brass industry in, 231-238; pin machinery, 233. New Britain, Conn.: hardware manufacture in, 171. Newell, Stanford: Franklin Machine Co.: 125. New England industries: early development of, 109-110; cotton, 114; iron, 116, 117, 118. New England Screw Co.: 126. Newton & Cox: 266. Newton Machine Tool Works: 266. New York: early steamboat trade, 127. Niles, James and Jonathan: 251. Niles & Co.: 267, 273. Niles-Bement-Pond Co.: 179, 222, 255, 259, 273. Niles Tool Works: 267, 273. Norris, Henry M.: 272. North Chelmsford Machine & Supply Co.: 124. North, Henry: 165. North, Selah: filing jig, 142. North, Simeon: 161-163; gun contracts, 131, 133, 134, 135, 137, 162, 163; interchangeable system, 133-134, 136, 142, 145, 162. Norton, Charles H.: precision grinding, 214, 224, 225. Norton, F. B.: 224, 225. Norton Company, The: 224, 225. Norton Emery Wheel Co.: 224. Norton Grinding Co.: 224, 225. Norwalk Iron Works Co.: 184. Oesterlien Machine Co.: 268. Ohio Machine Tool Co.: 269. Orr, Hugh: early mechanic, 116-117. Orr, Robert: master armorer at Springfield, 117. Otting & Lauder: 268. Owen, William: 271.