1. The claim of L. Pfeiffer that small granular amoeboid bodies are present in the blood of vaccinated children and calves, and in the blood from cases of variola, during the stage of fever is confirmed. A nucleus has not been positively made out in any of these bodies. 2. Granular amoeboid bodies, having a diameter about one-third that of a red blood cell, appear, also, in the blood of the mon...