Preface to Second Edition 



This little manual has been prepared for the 

 purpose of aiding owners of spraying machines to use 

 them to best advantage. The practical results of the 

 most recent investigations and experiments have been 

 embodied in it ; and technical terms, so far as possible, 

 have been excluded. 



The development of the practice of spraying crops 

 furnishes a striking illustration of the practical results 

 agriculture may derive from scientific investigation 

 and accurate experimentation. Little more than a 

 decade has passed since Professor A. J. Cook, then 

 of the Michigan Agricultural College, began his 

 experiments in spraying apples to prevent the injuries 

 caused by the Codling Moth experiments which first 

 proved to the horticultural public that the remedy was 

 safe and sure and to his enthusiastic advocacy of the 

 process American fruit-growers are largely indebted 

 for the introduction of spraying machinery. The 

 success which followed spraying for the Codling Moth 

 naturally led to experiments in spraying for other 

 insects, and later for fungous diseases ; our early 

 knowledge of remedies for the latter being largely due 

 to the efforts of Messrs Scribner and Galloway, of the 

 United States Department of Agriculture. The estab- 

 lishment of the state experiment stations has greatly 

 aided the acquisition and diffusion of information upon 

 the whole subject. 



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