55. (LV. 149) REITANO (Reitano, quoted from Rontal, Journal of Bacteriology 1933 III, page 112) vaccinated human beings with virus contained in dog ticks and produced typhus. 56. (LV. 150) One immunization experiment dating from the World War cost the lives of 50 Turkish soldiers. In the year 1915 immunization experiments against typhus were to be carried out in the hospitals of the 3d Turkish Army with inactivated blood from a diseased person. The doctor concerned took the blood from typhus convalescents and injected it, as HAMDI (Hamdi, On the Results of Immunization Experiments against Typhus-Exanthem. Hygiene Journal, 1916, 235) reports without having inactivated it, into 120 soldiers. Each received 5 ccm. subcutaneously. One soldier died after 14 days, others contracted typhus which, however, progressed in a satisfactory manner. After this the doctor vaccinated another 310 soldiers in the same way. Of these, 174 became ill and 49 died. On the average the incubation period was 12 days. * * * * * _PLAGUE_ 62. (LV. 165) * * * BULARD (A. F. Bulard, De Moru, The Oriental Plague, Paris 1839) * * * * * * * * Experiments continued to be carried out on condemned persons. On 17 August at 8 o’clock in the morning, 18-year-old Ibrahim Hassan, who had been condemned to death, was dressed in the shirt, underwear, and jacket of a person seriously ill with the plague. Immediately after this he was placed in the bed of one of the patients which was still warm from the patient’s fever. Until 21 August there was no sign that even the slightest infection had taken place. No symptoms of the disease had developed. On the evening of the same day, however, he complained of a slight headache, loss of energy started, the blood circulation accelerated * * * A Plague Bubo developed in the left groin * * * 25 August: Further vomiting of dark green matter. The tongue is dry and has a slightly brackish appearance. The pulse is light and quick. Respiration is jerky, the features are distorted. In the night death occurs. On 7 August at 8 o’clock in the evening, Mohammed Ben Ali who has been condemned to death was dressed in the shirt, underwear, and jacket of a person seriously ill with the plague. Immediately thereafter he was placed in the patient’s bed. Until the 22d no symptoms of disease. On the morning of the 23d severe outbreak of the disease. Tottering gait, then walking impossible. Extreme loss of energy, appearance of being seriously ill * * * * * * * * On 18 August we inoculated a person condemned to death with blood through 4 vaccinational cuts in the fold of the right arm. This blood was taken from a head vein of a plague patient who had been ill for 2 days * * *