x CONTENTS 



CHAPTER PAGE 



XXIII. Common Hand-Tools 262 



XXIV. Transmission of Power 283 



XXV. Boilers and the Generation of Steam 302 



XXVI. The Steam Engine. . ! 328 



XXVII. Methods of Heating 342 



XXVIII. Ventilation 354 



XXIX. Gas Engines 359 



XXX. Iron and Iron Molding 369 



XXXI. Problems in Pattern-Making 384 



XXXII. The Making and Working of Wrought Iron 390 



XXXIII. The Making and Working of Steel 400 



XXXIV. Structural Steel 415 



XXXV. Machine-Shop Practice 418 



XXXVI. Sheet Metals 441 



XXXVII. Plumbing and Water Supply 460 



