6 CONTROL BULLETIN NO. 148 



soluble alkali mainly as sodium hydroxide, which is a strong caustic. This was 

 possibly a combination of paint and caustic poisoning. 



In two other cases referred by the Veterinary Science Department, one in- 

 volving the death of two animals, the other the death of one animal, lead was 

 found in amounts ranging from 10 to 22.5 parts per million. Since no arsenic 

 was present, paint poisoning was indicated. 



A case, also referred by the Veterinary Science Department, involved the 

 death of chinchillas: 43 parts per million of zinc and 8.1 parts per million of lead 

 were found in the livers. 



Two samples were received from the Entomology Department of the Uni- 

 versity. One consisted of a large number of dead bees, the other consisted of 

 the hearts and livers of two robins. Death in both cases was thought to be due 

 to DDT spray. The bees were found to contain 62.5 parts per million of DDT. 

 The composite sample of the hearts and livers of the robms contained 120 parts 

 per million of DDT. 



Other samples were received during the year in which no significant quantities 

 of the toxic elements for which tests were made were found. 



Most of the cases handled by the Control Service have been with the help and 

 advice from members of the University's Veterinary Science Department. The 

 information furnished by these members has made possible the avoidance of a 

 great deal of unnecessary analytical work. 



