DRY-FARMING: 



ITS PRINCIPLES AND PRACTICE 



BY 



WILLIAM MACDONALD 



M.S.AGR., SC.D., PH.D., 



FELLOW OF THE ROYAL SOCIETY OP 



EDINBURGH AND THE GEOLOGICAL SOCIETY OF LONDON, 



DRY-LAND AGRONOMIST, TRANSVAAL DEPARTMENT OF AGRICULTURE 



FOREIGN VICE-PRESIDENT AND CORRESPONDING SECRETARY 



FOR THE DRY-FARMING CONGRESS 



flllttstratefc 



NEW YORK 



THE CENTURY CO. 



1909 



