Since the results in the literature are at considerable variance regarding leaf temperatures with reference to the surrounding air temperature, the writer thought it would be of interest to check some leaf temperatures in a different section of the country from those previously reported. The investigations of Curtis (2) were performed at Berkeley and Riverside, California, and those of Clum (1) at Ithaca, New York. The results of Miller and Saunders (5) were obtained in Kansas, and those of Eaton and Belden (4) in Arizona.