In the last ten years a revolution has occurred in the views of anemia. To indicate what the advance has been I propose (1) to review briefly the work of a series of experimenters and clinicians, (2) to present a new classification of the anemias based on their work, and (3) to discuss the methods of therapy.
REVIEW OF RECENT RESEARCH
The ball was set rolling, so to speak, by an extraordinary series of researches planned on a large scale, begun before 1920 and continued with great industry to the present day by Whipple and Robscheit-Robbins1 at the University of Rochester, N. Y. These workers studied the treatment of long sustained secondary anemia in the dog by various diets and other forms of therapy. They cleared up many inconsistencies in the work of their predecessors by the manner in which they brought about the anemias in the dog. It