The Variability in Rabbits Used for the Assay of Insulin

TiiiC question whether insulin deteriorates in the tropics, owing to the heat to which it is subjected to when passing through the Red Sea or during the hot weather, was first brought forward by Major E. C. Taylor, i.m.s., in 1923. More recently, in a letter in the Indian Medical Gazette, it was suggested that this apparent deterioration may have something to do with the difference in breed of rabbits used in these assays. The more experience one gains in these pharmacological assays, the more one realizes the importance of the variations in the different individuals under test, or even in excised tissues taken from the