BLOOD

Abstract
In selecting articles to include in this second review of hematology, it has been the policy to consider only those which have a bearing on the recent advances in this field. It has not been possible, nor would it be advantageous, to present a summary of all papers which have been written during the year ending Jan. 1, 1935. If any essential articles have been omitted, we present our apologies. As a result of this plan, it may appear as though too much space has been devoted to some phases of the subject and too small amounts to others, but under the circumstances this could not be avoided. PERNICIOUS ANEMIA ETIOLOGY The most important discussions centering about the etiology of pernicious anemia during the past year are primarily concerned with the nature of the intrinsic and the extrinsic factor, the site of the interaction between the two and the