Dusting cotton plants during periods of active shedding with 100 ppm. of Na 4-chlorophenoxyacetate and 1000 ppm. of naphthaleneacetic acid was without significant effect on boll shedding or retention in either 1947 or 1948 in the San Joaquin Valley of California. Spraying plants weekly with a 20-ppm. soln. of Na 4-chlorophenoxy acetate, in an expt. where naphthaleneacetate and napthoxyacetate sprays were without effect, significantly reduced the number of bolls per plant and number of bolls per 100 g. of stems and leaves, and caused some increase in vegetative development. The treatment caused the margins of about half of the leaves .to flare. Various synthetic-hormone sprays used on non-photo-'' periodic and on short-day cottons and under various conditions did not materially alter the proportions of fruiting and vegetative branches developed. As regards length-of-day reactions, the fruiting branches of the cotton plant are homologous to the inflorescences of other plants.