During the past ten years in the treatment of hayfever I have not only attempted to procure good results for the ensuing season but have also had in mind and hoped for permanent results. This paper, therefore, deals only with those patients who have been treated and have probably been under observation for a long enough time to justify the word cured. A series of 100 patients is presented and the data are grouped into three tables. In table 1 are presented the records of thirty-nine patients who were treated until the cutaneous tests with the pollens, to which they were previously sensitive, were either negative or practically negative, and who have been free from symptoms of hay-fever for a period of three or more years since the cessation of treatment. In table 2 are presented another group of thirty-nine patients in whom equally satisfactory clinical results were obtained; in