was always found certain algoids resembling the palmeliae. 

 Similar examination of saliva of residents of non-malarious 

 districts showed none of this particular form of bacteria. 

 Dr. Salisbury's researches were carefully made and the mi- 

 croscopical work well checked. 



His conclusions were that malarial fever was produced 

 by spores of bacteria that rose only a definite distance 

 from the soil level in infected districts, and that these were 

 never present in the air during the da}*. Dr. Salisbury's 

 work was done in his course of instruction at the medical 

 school of Cleveland. These researches attracted more 

 attention abroad than at home. The work was translated 

 into French and first published in the Revue des Cours 

 Scientifiques of November 6, 1869. 



The saliva of all those examined in the malarial district 

 contained the special form of bacteria to which he attrib- 

 uted the disease. If his conclusions and the later ones of 

 Crudeli are correct, and those also of the water infec- 

 tionists, we must say that malaria comes from both causes. 



In 1 88 1 Dr. Alphonse Laveran discovered the plasmo- 

 dium of malaria, which he named " oscillaria malaria." 

 His description is considered more correct than that of 

 Klebs and Crudeli. 



I present the following conclusions on malaria: 



First That malarial disease is primarily due to a 

 bacillus of certain type. 



Second That such bacilli germs are found in the soil, 

 air and water of malarial districts. 



Third That neither water alone, air alone, or soil 

 alone, will support the life history of the malarial bacillus. 



Fourth That the germ of malaria may be carried in 

 earth, air or water. 



