24 THE BACTERIA. 



Chrococcece and of the Osdllarice. We will re- 

 turn to this subject when we speak of the clas- 

 sification of the bacteria. 



In 1876, appeared in the same number of 

 Cohn's " Beitr'age " two important papers. The 

 first, by Cohn, treats of. the influence of tempera- 

 ture upon the bacteria, of their origin, of the 

 formation of spores in the Bacillus of hay infu- 

 sion, and of charbon. The second, by Koch, 

 gives the result of his researches upon the bac- 

 teria of charbon, the Bacillus anthracis. 



Koch has been able by skilful cultivation to 

 follow the complete development of this Bacillus, 

 and to witness the formation of spores, of which 

 the vitality is very great, and which are the prin- 

 cipal agents of the transmission of this terrible 

 malady. 



I must still indicate, in addition to these special 

 works, a quantity of notes and of memoirs scat- 

 tered through the reviews and periodical publica- 

 tions. 



The list will be found in the bibliography ap- 

 pended to this work. I must also cite the recent 

 work of M. Nageli upon "The Inferior Fungi 

 and their Bole in Infectious Maladies." The 

 learned professor of Munich has studied the di- 

 verse fungi which produce decompositions. He 

 divides them into three groups, — the Mucorini, 

 the Saccharomycetes, and the Schyzomicetes, which 

 correspond to the bacteria. According to Nageli, 



