APPENDIX. Ivii 



have been caused or hastened by his spraying orchard trees for 

 several years in succession with Paris green. If the poison comes 

 in contact with wounds or abrasions of the skin, ulcers are some- 

 times formed which will not heal until spraying is given up. 

 Symptoms of a mild form of this poisoning resemble those pro- 

 duced by the poison ivy (Rhus toxicodendron)^ and sprayers who 

 are poisoned usually attribute their symptoms to that cause. 

 While serious poisoning from spraying is rare, the mild symp- 

 toms are quite frequently shown ; and in some cases, if spraying 

 is done continuously for a considerable period of time, chronic 

 poisoning will result. There is probably little danger of fatal 

 poisoning except in cases of invalids or elderly people. 



In spraying with arsenites, serious effects may usually be avoided 

 by using the following precautions : cover any wound or abrasion of 

 the skin, so that the insecticide cannot come in contact with it ; 

 when spraying with an extension nozzle or pole, use an elongated 

 leather washer below the nozzle, so as to carry off the drip ; wear 

 rubber clothing and a rubber or oil hat of the shape of a " sou- 

 wester" or tarpaulin, and take care to stand as far as possible 

 to windward of the spray. The face and hands should be thor- 

 oughly washed immediately after spraying, and the entire body 

 should be bathed daily. 



The usual treatment for arsenical poisoning is well known to 

 medical men. An antidote for local external poisoning not gener- 

 ally known is acetate of lead, commonly called sugar of lead. A 

 strong solution of this in water will allay serious inflammations 

 of the skin, caused by arsenical poisoning, but it should only be 

 applied externally, and even then with care, as it possesses poison- 

 ous properties. 



