To the Editor: —On page 465 ofThe Journal, August 5, appears a letter of inquiry and your answer under the heading "Caritol and Carotene." The S. M. A. Corporation regrets if it has given the impression that it makes any therapeutic claims for Caritol. While making no claims for Caritol beyond readily verifiable statements about its composition, we have made numerous references to the literature of vitamin A and carotene, a literature that is unusually rich in observations. As producers of carotene, we feel it our duty to bring such new information to the attention of practicing physicians. Shastid's paper offered such revolutionary ideas that it seemed to us important to bring these results to the attention of ophthalmologists. Our object in doing this was to be of service in bringing the published material to the attention of interested specialists and thus to permit the earliest possible evaluation of