This report represents the result of an allergic study of certain cutaneous diseases over a period of four years. The investigation was carried out by a group of four physicians under the direction of Dr. Aaron Brown, assisted by Dr. Edgar B. Spiegel, Dr. Samuel Friedman and me. The cases were carefully chosen from the department of dermatology. In all, 262 patients were investigated. Because of the numerous visits that were required for a thorough study, only about 45 per cent of the patients were followed through completely.
A detailed and careful history was obtained in each case. This is without doubt the most important single factor in the proper study of a supposedly allergic person. A standard set of about sixty printed questions was used, in addition to which special questions were asked according to circumstances.
METHODS OF TESTING
The following technics were used:
Dermal or Scratch Method.—A