Page 22: A History of Technology: Vol. II, The Mediterranean Civilizations and the Middle Ages c. 700 B.C. to c. A.D. 1500, eds. Charles Joseph Singer et al. (New York: Oxford University Press, 1956), 152; 42: Kenneth D. Roberts, Some 19th Century English Woodworking Tools: Edge & Joiner Tools and Bit Braces (Fitzwilliam, N.H.: Ken Roberts Publishing Co., 1980), 234; 50: The Various and Ingenious Machines of Agostino Ramelli (1588), trans. Martha Teach Gnudi (Baltimore: Johns Hopkins University Press, 1976), plate 188; 52: The Various and Ingenious Machines of Agostino Ramelli (1588), trans. Martha Teach Gnudi (Baltimore: Johns Hopkins University Press, 1976), plate 129; 58: Wapenhandelinghe van Roers, Musquetten end Speissen, Achtervolgende de Ordre van Syn Excellente Maurits, Prince van Orangie . . . Figuirlyck vutgebeelt door Jacob de Gheyn (Musket drill devised by Maurice of Orange) (The Hague, 1607); facsimile edition, New York: McGraw-Hill, 1971; 60: Hugh B. C. Pollard, Pollard’s History of Firearms, ed. Claude Blair (New York: Macmillan, 1983), 35; 65: Charles John Ffoulkes, The Armourer and His Craft: From the XIth to the XVIth Century (New York: Benjamin Blom, 1967), 55. Redrawn by author; 66: Charles John Ffoulkes, The Armourer and His Craft: From the XIth to the XVIth Century (New York: Benjamin Blom, 1967), plate V. Redrawn by author; 80: Ken Lamb, P.L.: Inventor of the Robertson Screw (Milton, Ont.: Milton Historical Society, 1998), 152; 90: Christoph Graf zu Waldburg Wolfegg, Venus and Mars: The World of the Medieval Housebook (Munich: Prestel-Verlag, 1998), 88; 95: A History of Technology: Vol. II, The Mediterranean Civilizations and the Middle Ages c. 700 B.C. to c. A.D. 1500, eds. Charles Joseph Singer et al. (New York: Oxford University Press, 1956), 334; 98: Robert S. Woodbury, Studies in the History of Machine Tools (Cambridge, Mass.: MIT Press, 1972), Fig. 30; 114: T. K. Derry and Trevor I. Williams, A Short History of Technology (New York: Oxford University Press, 1960), 236; 118: A. G. Drachmann, Ancient Oil Mills and Presses (Copenhagen: Levin & Munksgaard, 1932), 159. Redrawn by author; 130: Derek J. de Solla Price, “Gears from the Greeks: The Antikythera Mechanism—a Calendar Computer from ca. 80 B.C.,” Transactions of the American Philosophical Society 64, pt. 7 (November 1974): 37; 141: M. H. Morgan, Vitruvius, The Ten Books on Architecture (Cambridge, Mass.: Harvard University Press, 1946), 295. Pages 101, 115, 120, 122, 145–151 were drawn by the author.