At the meetings of the American Association for the Advancement of Science held at St. Louis last Christmas, the $1000 prize for the most outstanding paper presented at the meetings was awarded to Dr. P. W. Zimmerman and Dr. A. E. Hitchcock of the Boyce Thompson Institute. The paper for which they received the prize dealt with the results of their experiments on the effect of various chemical substances on the local initiation of adventitous roots on stems and leaves, proliferation, the swelling and bending of stems, the acceleration of growth and epinasty. Certain chemical substances including ß indoleacetic acid, ß indolebutyric acid, ß indolepropionic acid and α napthaleneacetic acid induce striking responses when applied to plants in solution in water or in lanolin paste
