The analysis of a group of eighty-four cases of asthma in children who were followed for from six months to three years is presented. All the patients were tested by the intracutaneous method and with extracts made according to the method of Coca. In an analysis of this series, it is found that the age of onset of the first attack of asthma is most frequently in the first three years of life, as is shown in table 1. Forty-one patients had their first attack of asthma before the age of 3 years. In a previous study reported by me,1 14 per cent had their first attack in the first year of life, and 19 per cent in the second year. The similarity of these figures for two separate groups indicates the importance of asthma to the pediatrician.
Going further into the histories of these patients, it is interesting