To the Editor:— Dr. Scannell's contention (The Journal, June 23, p. 614) that "citrated" blood should not be classified as "whole" blood is erroneous. "Whole" blood means that the blood used for transfusion contains all the vital elements of the blood. Even when a small amount of sodium citrate is added to the blood (0.38 per cent), the blood represents "whole blood." Whether the complicated technic of the stopcock method or similar apparatus (Unger, Soresi, Miller, Scannell, Oehlecker and many others) or the most flexible and simple citrate method is used, the blood represents "whole blood." "Citrated blood" is justly called "whole blood" in contradistinction to citrated plasma, which contains only a small part of the vital blood constituents. I suggested the citrate method of blood transfusion in 1915. Unger (then an intern at Mount Sinai Hospital) constructed at the same time his apparatus, which was the most popular among