32 SPRAYING CROPS 



chemist states: "I am of the opinion that further 

 experiments of this nature would only serve to corrob- 

 orate this negative result, and to prove that there are 

 no grounds on which to base a suspicion that our 

 sprayed apples are poisonous. The insoluble character 

 of this poison precluding its assimilation by the apple, 

 if such were possible, the infinitesimal part of Paris 

 green that can remain on the apple, the frequent rains 

 subsequent to the spraying, all go to substantiate 

 the argument that there is not the slightest danger of 

 poisoning in using sprayed apples." 



There is abundant evidence of a similar nature 

 concerning the use of copper salts on grapes. In France, 

 where a large proportion of the grape crop is converted 

 into wine, elaborate investigations have shown that 

 practically none of the copper salts are present in wine 

 from sprayed vineyards. Professor B. Fallot, of the 

 School of Agriculture of Montpellier, in recording the 

 results of one of these investigations, says : "The 

 figures obtained have proved once more that wines, 

 after the grapes have received numerous treatments 

 with large quantities of salts of copper, contain 

 scarcely a trace of this substance, and are entirely 

 harmless." 



SPRAYING APPARATUS 



The chief requisites of a good spraying machine 

 are that it be durable, easily worked, not too expensive 

 for the purpose desired, that it throw a fine spray and 

 have a good-sized cylinder, and that the reservoir 

 holding the liquid be large enough for the purpose 

 intended. For fungicides the parts touching the liquid 

 should be made of brass. Although twenty years ago 

 there was scarcely an implement for this purpose upon 

 the market, there are scores of them to-day, and 

 several manufacturers handle them exclusively. They 



