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



and their appetite was much better. In two or three days more 

 they drank water freely, ate their grain ration heartily and began 

 to look well rounded out. This improvement continued until 

 the end of the experiment. 



When the experiment was discontinued at the end of three 

 weeks of recovery treatment the calves appeared to show no ill 

 effects, except that their weight was probably less than it would 

 have been had they not been fed for a time on grass containing 

 the spray material. In other words, they appeared to have 

 been set back three or four weeks in their growth. 



Plot III. — Arsenate of lead at the rate of 10 lbs. to 50 gallons 

 •of water. 



The two calves placed in this pen at once began to eat the 

 grass readily and at the close of the first day showed no ill effects. 

 By the end of the second day, however, they looked languid, 

 moved around very little and refused their grain ration. They 

 had now eaten about one-third of the grass in the pen. They 

 continued to eat sparingly of the grass and by the end of the 

 fourth day had consumed most of the grass in the pen. They 

 were now moved to a new plot sprayed as before. One of 

 the calves now showed stiffness or weakness of muscles and this 

 condition still prevailed on the fifth day. On the sixth day the 

 calves were removed to a barn, temporarily, because of rain. 



They were replaced in the pen on the seventh day. The 

 calves still showed ill effects and were unsteady. On the eighth 

 day one of the calves lay down most of the time. Both calves 

 were weak and staggered when they walked. On the ninth day 

 both calves were breathing hard. One of them, a Guernsey, 

 appeared to be the worse off of the two. The other, a black and 

 white grade, showed marked effects. 



On the next day, the tenth, both calves appeared better and 

 were able to get up. Both drank some water, but the Guernsey 

 had little appetite. Seemingly, on the following day, both 

 calves were better and were able to walk about without the 

 marked effects noted on the two or three days prior. They 

 were still weak, however. On the morning of the twelfth day the 

 Guernsey was again down and breathing hard. Her legs were 

 rigid and her eyes staring. Shortly afterward this calf died. 

 The remaining calf in the pen was now turned out in a large 

 ■enclosure on grass that had not been sprayed. Immediately 



