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These experiments prove that it is not safe to use more than one 

 pound of Paris green or London purple to 100 gallons of water on 

 cranberry vines; and gIso that a much smaller proportion, as one 

 pound to 200 or even 300 gallons, is amply sufficient to kill the vine 

 worm. 



The best results in the use of Paris green are obtained by mixing 

 about two quarts of glucose, or (if that can not be obtained) molasses 

 with 150 gallons of water and one pound of Paris green, and applying 

 with a force pump and nozzle which throws the mixture in the form 

 of the finest mist, and conliuuing till the [)lants are thoroughly wet but 

 stopping before it begins to run off from them. As the Paris green is 

 only in suspension in the water, it shouH be carefully stirred during 

 all ihe time the spray is being thrown upon the plants. 



Many of the cranberry grcjwers who have tri' d Paris green for the 

 vine worm report nnl'avorably, stating that it killed the worms but it 

 injured the vines; and most of ihitn informed me that they used a 

 teasi)o<)nfnl to a pail of water. Now, an otdinaiy pail cannot be 

 cairied about over a bog wilh more than two gallons of water in it. 

 A teaspoonful of Pai'is green is an indefinite quantity. I therefore 

 took a teaspoonfid heaped up as full as it vvoidd hold, and very care- 

 fully weighed it in delicate balances. It weighed halt an ounce, 

 whiih in two gallons of water would be in the p'oi)ortion of one 

 pound to G4 gallons, which, as shown above, would injure the leaves. 

 I then took a teaspoonful of Paris green somewhat heaped up and 

 found that it weiglied three-eights of an ounce which in two gallons 

 of water would be equal to the proportion of one pound to 8;') gallons, 

 which would injure the leaves. I then filled the teaspoo.i and stroked 

 it off with a stick leaving it only level full, and found that it con- 

 tained just one-fifth of an ounce, which in two gallons of water would 

 be in the proportion of one pound to 160 gallons, and if the Paris 

 green is to be measured in a teaspoon, it should be taken level or 

 even full only, for a pail of water. 



