The literature on the subject of allergy has become so voluminous that a review which approaches completeness far exceeds the scope of this article. The limited number of references here presented is intended to illustrate the drift of the newer work along this line.The chief developments presented during the past year lie in the discovery of new agents which cause allergy, more complete studies of molds and fungi in relationship to allergy, more complete study of oily substances of plant origin in relationship to dermatitis and more numerous reports of the conditions which have been grouped under the term physical allergy.
MECHANISM OF REACTIONCohen, Ecker and Rudolph 1 reported further results on a method of study which they introduced with Breitbart 2 in 1930. Their observations present a new idea concerning the fundamental cause of the hay fever and asthma reaction. The authors expressed the belief that the 1.