* * * continual subnormal temperature accompanied by bad general condition . . . * * * plasmodia moving in the blood * * * 5. (LV 11) The experiments of MARCHIAFAVA and CELLI are confirmed by a whole series of other Italian authors. I found the experiments in the book of MANNABERG (page 7) in the form of tables and reproduce them here in the same way. (vide pages 10-13) * * * (LV 12) CELLI (Celli: quoted from Mannaberg (7)) had several persons in the Roman hospital S. Spirito drink water from the Pontinc Marshes and from the marshes near Rome and found that these persons did not contract malaria. (LV. 13) BRANCALEONE (Brancaleone: quoted from Mannaberg (7)) repeated the same experiment in Sicily with the same negative result. (LV. 14) ZERI (Zeri: quoted from Mannaberg (7)) had 9 persons, for a period of 5-20 days, drink 1.5 litres of water each (in toto 10-60 l.) from a malaria district; he let 16 persons inhale the same water when sprayed. He administered it to 5 persons per rectum: none of the experimental persons got malaria. Also SALOMONE MARIO (LV. 15: Mario quoted from Mannaberg (7)) registered the same negative result. * * * * * No results were found in support of the water theory. It only remained to examine whether mosquitoes transmitted malaria through their sting. 6. (LV. 18) * * * BASTIANIELI (vide Mannaberg (7)) * * * To imitate the sting of the mosquito he did nothing but insert the point of the Pravaz syringe, moistened with malaria blood, under the skin. That sufficed in some cases to produce a severe case of malaria. * * * * * 7. (LV. 20) * * * 1895 ROSS (Ross, page 9) let 4 mosquitoes of the species anopheles suck themselves full on the Indian Abdul Radir who had numerous crescent-shaped formations in his blood, and on 25 May he let the twenty-year-old Lutschmann, who was stated never to have been sick before, be stung by them. On 5 June the latter contracted fever which lasted for 3 days. * * * * * 8. (LV. 23) In 1917 WAGNER-JAUREGG (Wagner-Jauregg: Psych. neurol. weekly 1918) introduced artificial malaria infection to cure progressive paralysis. Following this, now experiments were initiated. * * * * * 9. (LV. 25) F. MUEHLENS and W. KIRSCHBAUM (Muehlens and Kirschbaum: Further Parasitological Observations on Artificial Malaria Infection of Paralytics. Archives for Ship and Tropical Hygiene 1924, Vol. 28, No. 4, page 131) in 1924 report on artificial malaria infection for the treatment of paralysis. * * * * * _DIPHTHERIA_ * * * * *