No. 4.] GYPSY MOTH — APPENDIX. 393 



the tannery and fed to the horse during the afternoon and 

 evening; of June 26. On June 28 the writer found the 

 horse well and hearty, and in '■^better condition" so the 

 teamsters at the tannery stated, than before the grass had 

 been fed to him. The poison used in spraying was mixed 

 with cold water, and in a few days it was found that the 

 foliage of the pear tree was badly burned, thus proving the 

 presence of soluble arsenic in the mixture, and showing that 

 it was even more dangerous to animal life than properly 

 prepared arsenate of lead would have been. 



