238 BOARD OF AGEICULTURE. [Pub. Doc. 



times analyzed, and proved to he the equal of any in the 

 market. While tl>e spraying did not kill all the gypsy moth 

 caterpillars, it did kill other insects on the same trees. Yet 

 a grove of trees that was twice sprayed with Paris green of 

 a strength of one pound to one hundred gallons of water was 

 afterwards entirely stripped of its leaves by these caterpil- 

 lars. Many died, yet after the trees had l)een stripped and 

 the insects had pupated, one man gathered one thousand one 

 hundred and sixty-five living pupne in an hour under these 

 same trees. In another instance the same experiment was 

 tried on a larger scale, with similar results. 



Other insects were killed in great numbers by the s})ray-' 

 ing in this district, and it was noticeable that never had the 

 trees l)een so free from insects as in the season of 1891, and 

 never had the crop of fruit been so large and of such good 

 quality. Many people who were at first prejudiced against 

 the spraying afterwards testified to these facts. One of my 

 neighbors who had Lost many leaves from his trees through the 

 spraying expected to lose the entire fruit croj) ; yet his crop 

 of apples so far exceeded his expectations that he was unable 

 to gather them all, and sokl the remainder on the trees. lie 

 told me that the fruit was all large and fair, with the excep- 

 tion of that on one tree which was not infested and had not 

 been sprayed, and that most of the apples from that tree 

 were wormy and worthless. Certain trees appear to be 

 more susceptible to arsenical poisoning than other trees of 

 the same species, and certain species of trees are more sus- 

 ceptil)le than other s[)ecies or varieties ; therefore a spraying 

 of a strength that will not injure one tree may injure another. 



As at one time two hundred and forty men were at work 

 spraying, there was undoul)tedly some carelessness and 

 occasionally a tree was injured ; but I know of no instance 

 where i)ermanent injury has been observed as a result of the 

 spraying. 



Much has been said al)()ut the danger to animals from this 

 spraying ; but it is hardly possible that the infinitesimal 

 quantity of arsenic whicli is distributed in this way on each 

 tree or plot of grass could injure an animal of any size. I 

 have, iiowever, noticed the sudden demise of several flocks 

 of hens, and this demise was quite frequently coincident with 



