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



But on the seventh day they were in the plot again and appeared 

 to be practically normal. 



By the ninth day the second lot of grass was gone and on the 

 tenth day the third plot was prepared and the calves placed in it. 

 They appeared to show no further marked effects at this time, 

 altho they did not seem to be quite as heavy or well rounded out 

 as they should. At the end of sixteen days they were transferred 

 to a fourth plot. 



At the end of the twenty days the calves were transferred to a 

 fifth plot. They still showed no definite symptoms of 

 poisoning or other marked ill effects, except some failure to gain 

 weight. At the end of twenty-four days they were transferred 

 to a sixth plot ; at the end of twenty-eight days to a seventh. They 

 were still in approximately the same condition. 



At the end of thirty-one days the experiment was discontinued. 

 Seemingly the only results were a failure to gain weight properly, 

 together with occasional dullness or listlessness, but without 

 symptoms of acute poisoning. 



Plot II. — Arsenate of lead at the rate of 6 lbs. to 50 gallons of 

 water. 



After two days' feeding the two calves in this plot apparently 

 had no appetite and were not inclined to drink water, but showed 

 no symptoms of acute poisoning. On the third day they appeared 

 listless; their grain ration was untouched. By the fourth day 

 they had eaten about all of the grass in the pen but had not 

 eaten it as closely as the calves in plot I. 



A new plot was now prepared and the calves were transferred 

 to it. At the end of the fifth day it was necessary to remove 

 the calves from the pen and place them in a barn temporaril}'-, 

 because of cold rains. The next day they were again placed in 

 the pen but they still appeared to be in rather poor condition. 

 On the eighth day they were eating very little and lay down most 

 of the time. Their movements were stiff and they seemed weak. 

 Apparently, they showed definite effects of the poison. 



On the eleventh day the two calves were removed to a 

 large plot of fresh grass to which no spray material had been 

 applied and were allowed to graze there until the close of the 

 experiment. This was done in order to observe rapidity 

 of recovery. Within a short time, both calves showed marked 

 improvement. Their weight increased, they looked brighter 



