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. Paints and Varnishes 369 



XXXI. Trees 390 



XXXII. Lumber 396 



XXXIII. Defects of Woods 412 



XXXIV. Hand Wood-Working Tools 417 



XXXV. Power Wood-Working Machines 432 



XXXVI. Patterns, Cores, Flasks, and Molds. . 439 



