56 N. H. AGR. EXPERIMENT STATION. [Bulletin 183 



using arsenate of lead, at the rate of 10 lbs. of the paste to 50 

 gallons of water and applying 12 gallons of spraj?- material. 

 Two sheep were pastured within a pen beneath this tree. 



In this case, definite symptoms appeared, altho the sheep sur- 

 vived. At the end of the first day there was evidence of poison- 

 ing. At the end of the second day both sheep were sluggish 

 and one of them wanted to lie down. In 3 days more, however, 

 the symptoms gradually abated and at the end of the eighth day 

 the sheep were moved to the stock pen. They had not yet 

 recovered their appetite and there were still some evidences of 

 poisoning, altho these evidences were hardly acute. As soon 

 as the sheep were moved to the stock pen, free from sprayed 

 material, they at once began to eat and in 9 days more they 

 seemed to have fulty recovered. 



SUMMARY AND DISCUSSION. 



The remarks that have been made in discussing the results with 

 calves, concerning the amounts of poison actually ingested in 

 these experiments, apply to the results noted with sheep. 

 Clearly, they did not get all of the poison that was applied to the 

 grass. Just as clearly, however, the conditions under which 

 they were pastured represent probably as severe circumstances 

 as would be found under field conditions where anything like 

 ordinary care was observed in the application of spray material. 



Certainly, so far as these experiments are concerned there was 

 no acute poisoning of sheep confined to the grass beneath sprayed 

 trees, so long as the material was applied in concentration of 3 

 lbs. of arsenate of lead i3aste to 50 gallons of water. There was 

 very little poisoning where the concentration was increased to 

 6 lbs. Even with the spray material applied at the rate of 10 

 lbs, of arsenate of lead paste to 50 gallons of water, with the 

 sheep confined exclusively to sprayed grass and with excessive 

 amounts of material applied to trees, resulting in heavy drip, 

 the sheep survived. 



SYMPTOMS OF POISONING. 



The symptoms of poisoning observed in these experiments 

 have been similar thruout in calves, sheep and guinea pigs. 

 Usually, loss of appetite and refusal to drink water are ob- 



