The total number of leucocytes is slightly increased. In our cases the mononuclear cells have averaged 66 per cent., which is somewhat high even for infants. This has been the experience of Labor, who, however, also describes an eosinophilia during convalescence, a phenomenon which we have not encountered. Some describe a marked increase in the polynuclear cells, which, probably, is to be regarded as the reaction to secondary infections. There is indeed a marked difference of opinion in regard to the morphology of the blood in scurvy in adults as well as in infants. Some found a large number of one type of cell--for example, nucleated red cells, myelocytes, eosinophiles--whereas others have failed to observe an increase of these cells. The divergent reports probably should be attributed to the fact that the investigators are describing scurvy of various grades of severity, of different stages of development, or complicated by intercurrent disease. Nobécourt, Tixier, and Maillet have questioned whether there is always complete recovery from this anemia, which is severe from the standpoint of hemoglobin and iron. The older authors reported instances where men have been weakly and ailing for the remainder of their lives after an attack of scurvy. In some infants pallor and anemia may persist for months after apparent cure; however, this is the exception rather than the rule. In view of the fact that scurvy frequently is classed as a hemorrhagic disease, and that hemorrhages play such an important rôle in its symptomatology, a consideration of the factors concerned in the _coagulability of the blood_ is of interest. In an investigation (Hess and Fish) it was found that the oxalated plasma (of blood taken directly from a vein) showed a slightly delayed coagulation time--eight to fourteen minutes. The "bleeding time" carried out according to the simple method of Duke was slightly increased. Holt reports a case where a child bled to death following incision into an epiphyseal swelling at the lower end of the femur. The number of blood platelets is increased, running parallel, as is usually the case, with the number of red cells (Table 4). This increase in the blood-platelets, recently confirmed by Tobler and by Brandt, is a very exceptional phenomenon, and was not anticipated in connection with a disorder characterized by hemorrhage. The antithrombin content of the plasma is normal.