Coca taken in infusion gave excellent results to Tschudy while he was sojourning in the valley of the Puna, the highest in Bolivia, which has given its name to the disease of mountain sickness, known in Peru by the name _Mal de Puna_, also designated by the words _sorroche_, _veta_ and _mareo_; this last term shows clearly enough the analogy which exists between sea-sickness and the influence of great altitudes on the human body. Experience has proved the usefulness of Coca against dyspnœa and vomiting, so that the Indians who make ascensions always carry a stock of Coca with them. Dr. Tschudy found himself comfortable by the use of it while hunting in those valleys, at a height of ten to twelve thousand feet above the sea. Dr. Salemi, of Nice, gives an account of a case of epilepsy in a woman, 38 years of age, cured by the daily and prolonged use of _Thé Mariani_, given in increasing doses (ten drops daily at first and eighty drops daily at the end of a month). This case is not an isolated one. IMPORTANT CAUTION. Owing to the success obtained by our preparations of Coca for many years, imitators and counterfeiters have dared to apply to their own valueless productions the observations made with our special products. These occurrences, often repeated, have given rise to protests from many physicians, among others Dr. W. Oliver Moore, Sir Morell Mackenzie, Dr. Ch. Fauvel. _To the Editor of the New York Medical Journal_: SIR: In your issue of January 3, 1885, page 19, in a report of a paper read before the New York Medical Society, on "The Physiological and Therapeutical Effects of the Coca Leaf and its Alkaloid," occurs the following: "For over twenty years Dr. Fauvel has used it, both internally in the form of _Vin Mariani_, and also by local applications to the pharynx and larynx in spray or by brush, in the form of a fluid extract, or, more recently, of a concentrated non-alcoholic preparation more of the nature of a cordial (prepared by Mariani & Co.)." Several manufacturers of Coca preparations have taken occasion to quote from this paper, each in turn substituting the name of _his own_ production instead of the one mentioned in the original. As the preparations of Coca mentioned in my paper were personally tested and found to be the best of a large number experimented with, I wish to call attention to these misquotations and substitutions. Very truly, W. OLIVER MOORE, M.D. *** We have taken the trouble to compare the report of Dr. Moore's remarks with the little book on Coca prepared by M. Mariani, and with the circulars issued by a number of manufacturers of Coca preparations; and we certainly think that some of these manufacturers have taken an unwarrantable liberty in appropriating work that evidently cost M. Mariani a good deal of time and no little outlay of money.—EDITOR _N. Y. Medical Journal_. _New York Medical Journal_, October 24, 1885.