In a previous article I reported a series of 100 patients apparently cured after preseasonal treatment for pollen hay fever. They were treated for varying periods during the interval from 1919 to 1925, inclusive, and were followed up for two or more years after the cessation of treatment. The present article reports a second series of 90 patients who were treated preseasonally for various periods during the interval from 1923 to 1930 and who have been followed up for three or more years since the cessation of treatment. The records of these 90 are presented in tables 1 and 2. Table 3 shows the inadvisability of stopping treatment too soon. Finally, in table 4 are presented statistics computed from all the patients treated preseasonally during the interval from 1919 to 1930, including those reported in the former article, as well as those of this series.
METHOD AND MATERIALS OF TREATMENT