Abstract
Employing salts of organic acids, such as succinate, lactate, fumarate, mucate and citrate, in media purely of synthetic nature, the author differentiated one sp. from another by their ability to utilize the C radical. Investigation of the nutrient requirements of these bacteria for N available from inorganic sources to decompose salts of organic acids for source of C and energy showed no differences among the spp. studied. Use of a synthetic medium saves considerable time.