58 N, H. AGR. EXPERIMENT STATION. [Bulletin 183 



quick succession is purgation, with feces abundant, watery, dark 

 in color and bloody. The urine is scanty and passed only at long 

 intervals. Paresis develops early, with the other symptoms, and 

 is progressive, affecting the posterior portions of the body most. 

 At this stage of development of the symptoms the head is moved 

 about nervously, the eyeballs are retracted and glassy, there is 

 more or less champing of the jaws, and at irregular intervals the 

 animal suffers from convulsions, from which it falls and struggles 

 violently. In fatal cases purgation continues, the pain becomes 

 intense, the expression of the face more anxious, pulse faster and 

 weaker, paratysis more marked and the convulsions more fre- 

 quent and severe. Partial coma precedes death. In this stage 

 the symptoms are less urgent, and there may be involuntary 

 passage of urine and regurgitation of material from the stomach." 



POULTRY. 



Experiments with poultry were so planned as to confine both 

 mature hens and young chicks to enclosures in which grass 

 had been sprayed with arsenate of lead. The amount of spray 

 material applied to the grass within each enclosure was pro- 

 portioned to the amount applied to the large pens in which calves 

 and sheep were pastured, as described above, but the pens used 

 for poultry were smaller and the actual amount of spray material 

 applied was, therefore, less. 



Three concentrations of material were used, as with the calves 

 and sheep; namely, the equivalent of 3 lbs. of arsenate of lead 

 paste to 50 gallons of water, 6 lbs. to 50 gallons, and 10 lbs. to 

 50 gallons. 



Three pens contained one hen each and 3 pens contained one 

 chick each. As soon as the hen or the chick had eaten all of the 

 grass within its pen, the pen was moved to a new plot prepared as 

 before. The hens and chicks had grain before them continually 

 and fresh water daily. The experiment continued for 56 days. 

 In this time all of the hens and chicks were moved 10 times and 

 consumed the sprayed grass in their pens each time. They showed 

 no symptoms of acute arsenical poisoning. They appeared not 

 to gain in weight as they should, and the chicks seemed to show 

 this symptom more than the hens. Otherwise the results were 

 the same. All survived in fairly good shape. 



