J34 EUCAL YPTUS. 



Fifth That the development of malarial bacteria in 

 sufficient quantities to attack and overcome the resistance 

 of human beings can only take place in localities without 

 complete natural or artificial drainage, where the sub-sur- 

 face water remains stagnant and where the temperature for 

 a prolonged period remains constantly above 62 F. 



Individuals vary as to their susceptibility of infection. 



First As to method of introduction of infection. 



Second As to individual resistance. 



Third As to condition of individual during exposure. 



Salisbury's work points to the air as the main source 

 of infection. The spread of malarial disease to leaward of 

 regularly affected localities and the wide spread dread of 

 night air in all the old malaria-cursed districts of the 

 world point in the same direction. 



vSenator Tommasi CrudeH, the distinguished collaborator 

 of Klebs, takes a similar view in his studies of Italian 

 malaria. R. Carlotti speaks of wind-carried malaria in 

 Corsica. 



Malarial disease has been diminished by quinine, by 

 drainage, by permanent flooding in the hot season (Egypt), 

 by gates on seacoast lagoons which close with the rising 

 tide and open for the exit of fresh water at low tide 

 (coast of Tuscany), and it is claimed by planting certain 

 species of Eucalyptus, especially Eucalyptus globulus and 

 Eucalyptus amygdalina. 



As far as I can learn the first published investigation 

 of the prophilactic and therapeutic value of the Eucalyptus 

 was by M. Tristani, a Spanish physician in the Compilador 

 Medico, 1865. 



It is in Spain that we still find the greatest belief in 

 the medicinal value of the Eucalyptus. In that country 



