In 1935 workers in Australia 

 discovered that cobalt was a lim- 

 iting factor in the nutrition of 

 cattle and sheep. Later, U.S. 

 workers were able to identify the 

 cause of "salt sick" of Florida, 

 "neck ail" of Massachusetts, 

 "Grand Traverse disease" of 

 Michigan, "Burton ail" or "Al- 

 bany ail" of New Hampshire, 

 and other troubles of cattle and 

 sheep as a cobalt deficiency. 



If cattle and sheep are given 

 cobalt supplements or if cobalt- 

 deficient soils are treated by 

 adding cobalt, the health and 

 productivity of these ruminants 

 are improved substantially. 



Washington, D.C. Issued April 1961 



For sale by the Superintendent of Documents, U.S. Government Printing Office, 

 Washington 25, D.C. Price 5 cents 



