Smeaton, John: 2, 3; boring machine, 2, 13; cast iron gears, 64. Smith, George: 214. Smith & Mills: 270. Smith & Phelps: 234. Smith & Silk: 271. Smith & Wesson: 138. Snyder, J. E., & Son: 22. Southwark Foundry & Machine Co.: 173, 256-257. Spencer, Christopher M.: 170, 175-177; turret lathe, 143, 176; board drop, 143; silk-winding machine, 175; repeating rifle, 175. Spencer Arms Co.: 177. Spring: planer, 50, 53. Springfield, Mass.: 230. Springfield Armory: 103, 136, 138, 143, 163; Blanchard’s lathes, 142-143. Springfield Machine Tool Co.: 271. Standard Tool Co.: 266. Stannard, Monroe: with Pratt & Whitney, 178. Steam boats: early, 82; Wilkinson’s, 119. Steam engine, Watt’s: new element in industry, 1; problems in building, 1-3; first built at Soho, 12; Maudslay’s improvements, 43. Steam hammer: 4; Nasmyth’s invention of, 93-96. Steam heating apparatus: Murray, 56. Steinle Turret Machine Co.: 277. Stephenson, George: 6, 32, 56, 150. Steptoe, John: 267-268. Steptoe Co., The John: shapers and milling machines, 268. Stone, Henry D.: 192, 193, 196; turret lathe, 143, 197. Swasey, Ambrose: 183, 262, 263; dividing engine, 264. Syme, Johnie: Nasmyth on, 84. Symington, William: iron boat, 14, 82. Taps and dies: developed in England, 4; Maudslay’s, 10, 42; Clement’s, 59. Taylor, Frederick W.: high-speed tool steels, 250, 277. Taylor & Fenn Co.: 165. Terry, Eli: clocks, 144, 171, 172. Textile industries: Arkwright and Strutt, 53; influence of Whitney’s cotton gin, 114; in New England, 114, 120, 123, 127; Slater’s influence on, 122. Textile machinery: Robert’s spinning mule, etc., 61; Bodmer, 77; in New England, 114, 120-121; Wilkinson, 122; Alfred Jenks, 123. Thomas, Seth: clocks, 144. Thomaston, Conn.: clock manufacture, 171. Thurber, Isaac: Franklin Machine Co., 125. Thurston, Horace: 214. Tool builders: general estimate of early, 107; in Central New England, Chapter XVII; Western, Chapter XX. Tool building centers: 127; map of, Fig. 56. Torry, Archie: Nasmyth’s foreman, 91. Towne, Henry R.: 257, 258. Towne, John Henry: 256-257, 258; screw thread, U. S. Standard, 249. Traveling crane, first: 77, 80. Trevithick: steam road engine, 56. Turret lathes: 140; early producers of, 143; Spencer, 176; Howe and Lawrence, 197; Hartness’ flat-turret, 198; Warner & Swasey, 262. Turret screw machine, improvements on: 207. Union Steel Screw Works: 198, 265, 266. Universal Radial Drill Co.: 273.