Nothing illustrates so practically arid satisfactorily the 

 importance and value of scientific investigation as the results 

 obtained by recent experiments in spraying with arsenites for 

 the destruction of insects, and with the copper solution or 

 Bordeaux mixture for the treatment of fungous diseases. 

 After long and patient study and experiment, scientific experts 

 have discovered several causes of the failure of the fruit crop, 

 and have recommended remedies which are proving effective 

 and reliable. 



These discoveries are of inestimable value, since without 

 the remedies suggested the spread of diseases and the ravages 

 of injurious insects would soon have put an end to several 

 branches of the fruit industry. W. C. Barry. 



The day is not far distant when fungicides, and the means 

 of applying them, will be as much a part of the equipment of 

 a first-class farm particularly one devoted to fruit or truck 

 as is the cultivator or market wagon. B. D. Halsted. 



We shall conquer when we know how. When we, with 

 open eyes and unstopped ears, as true students of nature, acquire 

 the knowledge within the possibilities of our reach, we shall 

 be able rightfully to assert our royal authority and effectually 

 to have dominion over every living thing that moveth upon the 

 earth. T. J. Burrill. 



The time is rapidly approaching when a farmer or garden( 

 will as little dare to neglect the study of the physiology and 

 pathology of plants, as a surgeon dare practice without a knowl- 

 edge of anatomy, or a sailor hope to become a captain wit 

 studying navigation. H. Marshall Ward. 



iv 



