 In addition to field experiments, Dr Cunningham undertook experimental work with rats in an attempt to gain knowledge of the function of cobalt in the animal system, and Josland investigated the blood-changes induced by cobalt deficiency.This work was done at the Wallaceville Animal Research Centre.Working under Dr Filmer, Josland, together with six veterinary officers, two chemists and two staff from the Department of Scientific and Industrial Research, investigated the facial eczema epidemic affecting stock in the Waikato District in 1938.