CONTENTS 



CHAPTER 



XXIV. Substitutes for the Tractor 

 XXV. Animal-Mechanical Tillage 

 XXVI. The General Purpose Motor 

 XXVII. Business Management of Traction Plowing 

 XXVIII. The Traction Engine in Dry-Farming 

 XXIX. Traction Farming in Corn Belt . 

 XXX. Power and the Food Supply 

 XXXI. ThexChoice of Power 

 XXXII. \ne Future of the Traction Engine . 

 Specifications of Leading Gas Tractors 

 List of Authorities Consulted 



PAGE 



233 

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 267 

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 289 

 298 

 309 

 317 



