2IO BACTERIOLOGY. 



treatment with the solution of iodine in iodide of potassium. 

 If the sections are left to decolorise in alcohol for forty-eight 

 hours the capsule is rendered visible. 



Bacillus Saprogenes, Rosenbach. Three 

 varieties of Bacillus sapro genes have been de- 

 scribed as intimately connected with Bacterium 

 termo in putrefactive processes.* 



No. i. Large rods which, cultivated on nutrient 

 agar-agar, form an irregular sinuous streak, with a 

 mucilaginous appearance. They grow also very 

 readily on blood serum, and all cultivations yield the 

 odour of rotting kitchen refuse. It is not pathogenic. 



No. 2. Rods shorter and thinner than No. i. 

 They develop very rapidly on agar-agar, forming 

 transparent drops, which become grey. They were 

 isolated from a patient suffering from profusely- 

 sweating feet. The cultivations yielded a character- 

 istic odour similar to the last. They are pathogenic. 



No. 3. Rods isolated from the putrid marrow 

 of a case of compound fracture. Cultivated on 

 nutrient agar-agar, an ash-grey, almost liquid 

 culture is developed, with a strong characteristic 

 odour of putrefaction. Injected into the knee joint 

 or abdomen of a rabbit, an opaque, yellowish-green 

 infiltration resulted. 



Comma-bacillus of the mouth. Curved 

 rods, spirilla, and threads have been described, in 

 connection with other bacteria, in relation to caries 

 of the teeth. Curved bacilli are also found in the 



* Rosenbach, Microrg. bei Wund-Infections-Krankh. 



