21 



To determine if enough of the copper, which is more or less 

 poisonous, remained upon the berries and stems to prove harmful, 

 ten pounds of stems and ti-n pounds of detached berries were selected 

 where it vvas most aWundant, and analysis gave the following results : 



Copper Oxide. Sulphate Copper. 

 10 lbs. .Stems contain .00996 lbs. = .0200 lbs. 



10 lbs. berries contain .00031 lbs. — .0006 lbs 



As the berry is the edible portion and as this result was obtained 

 by selecting the fruit with the greatest amount of the mixture adhering 

 the amount of copper oxide on the average fruit treated in this way 

 cannot be seriously objectionable, except from its appearance. 



The following table, giving the various qualities of the different 

 varieties, is based upon careful comparison of each with such varie- 

 ties as the Concord and Delaware, and shows fairly how they have 

 behaved in our plots the past season. 



In this table 1 indicates the highest degree of excellence. 



