Gage, Warner & Whitney: 218, 228. Gang, William E.: 268, 271. Gang & Dietz: 271. Gardner, Frederick M.: disk grinding machines, 275. Gardner Machine Co.: 276. Garvin Machine Co.: 127. Gascoigne, William: principle of micrometer, 211. Gay, Ira: 124, 216-217. Gay, Zeba: 124, 217. Gay & Silver Co.: 195, 197, 217; planer, 53. Gearing and Millwork: Chapter VI. Geier, Frederick A.: 272-273. “Genealogies”: Early English Tool Builders, Fig. 5; New England Gun-makers, Fig. 27; Robbins & Lawrence Shop, Fig. 37; Worcester Tool Builders, Fig. 45; Naugatuck Brass Industry, Fig. 50. Giddings & Lewis Manufacturing Co.: 276. Gisholt Machine Works: 276. Gleason Works: 183. Globe Rolling Mill: 251. Goddard, Benjamin: 225. Gorham, Jabez: 127. Gorham Manufacturing Co.: founded, 127. Gould & Eberhardt: 259. Grant, John J.: 214. Gray, G. A., Co.: 273. “Great Eastern,” The: 32. “Great Western,” The: 32. Great Western Railway: steamers, 93. Greene, Nathaniel: cannon factory of, 118. Greene, Mrs. Nathaniel: friend to Eli Whitney, 147; connection with cotton-gin, 148-149. Greene, Timothy: 119, 121. Greenwood, Miles: 267. Gridley, George O.: automatic lathes, 194, 200. Grilley, Henry: founder of brass industry, 232. Grinder: developed in America, 5; Brown & Sharpe’s, 213-214; disc, 275-276. Hakewessel, Reinholdt: 183; Acme automatic, 265. Hamilton, Alexander: entertains Brunel, 8, 27. Hamilton, Ohio: tool builders in, 273. Hampson, John: with Maudslay, 98. Hanks, Alpheus and Truman: foundry, 165. Harper’s Ferry Arsenal: 140, 143, 163; established, 136; interchangeable equipment, 137; rifle, 160. Harrington & Richardson: 226. Hartford, Conn.: 127; manufactories of, 164, 165, 170; gun makers of, 164, 166. Hartford Machine Screw Co.: 170, 174, 176. Hartness, James: 194, 197-198, 266; designer of machine tools, 198; flat-turret lathe, 198; Lo-swing lathe, 200. Haskell, Co., The William H.: 124. Hawkins, John Isaac: 69; on early gear tooth practice, 65-68, 70. Hayden, Hiram W.: 234, 236. Hendey Machine Co.: tool-room lathe, 182. Henn, E. C.: Acme automatic, 265. Herman, William: 271. Hick, B., & Son: 75. High Street Furnace: 125. Hildreth, S. E.: 222. Hobbs, Alfred C.: picks Bramah’s lock, 16. Holmes, Hodgin: cotton gin, 152, 154, 156, 157. Holmes, Israel: 232, 233, 234, 236. Holmes, Joseph: pioneer iron worker, 117. Holmes & Hotchkiss: 233. Holmes, Booth & Haydens: 234, 237. Holtz, Frederick: milling machine, 272. Holtzapffel, Charles: 74, 99; on Roberts, 60-61; plane surfaces, 100. Hovey, P.: partner of Pitcher, 124. Howe, Elias: sewing machine, 144. Howe, Frederick W.: 195, 196, 209, 217; milling machines, 138, 196, 208, 209; profiling machine, 143, 191;