The essentials of this book, rosin-weed, ichthyol, and faradism, were announced at the Baltimore meeting of the American Institute of Homoeopathy, in June, 1916, and published simultaneously in the New England Medical Gazette and in the Journal of the American Institute of Homoeopathy in December, 1916. They were presented also at the New York City branch of the United States Hay Fever Association in July, 1916; at the annual meeting of the same Association at Bethlehem, New Hampshire, in August, 1916; and rather widely printed in the public press of New York and Boston in the summer of 1916.

As a suggestion to those who may wish to follow the subject of hay fever in its recent interesting developments, chapters have been added on the old conception of gout, the new theory of anaphylaxis and treatment by diet, by pollen extracts and by bacterial vaccines.