In a recent paper1 many important clinical facts were brought to light from the study of a series of 400 patients with bronchial asthma. These facts all have a direct bearing on the determination of the cause of the condition and therefore indirectly they indicate the proper treatment. Among other facts, it was shown that 48 per cent. of the 400 patients were sensitive to some type of protein and that the younger the patient was when he began to have bronchial asthma the more apt was he to be sensitive to some protein. A table was presented showing the number of patients who were sensitive to the four chief sources of protein, namely, animal hair, food, bacteria and pollens, at the various ages of onset of bronchial asthma. The skin or cutaneous test was employed to determine whether or not the patients were sensitive.
The object of the present