THE CLASSIFICATION OF BACTERIA I2/ 



Beer or wort. A moist, slimy, smooth-veined membrane ; fluid only slightly 



turbid. Minimum temperature, 4-5 C. ; optimum temperature, 34 C. 

 Habitat. Beer and beer-wort. 



14. Bact. oxydans Henneberg 



Centralblatt f. Bakteriol., 2d Abt., Ill, 1897, 223. 



Morphology. Bacilli, 0.8-1.2: 2.4: 2.7 /A; in chains rather loosely jointed; 

 show rotatory motion (Henneberg, I.e.). Involution forms as filaments 

 with bud-like swellings; fluid turbid below the membrane. Optimum 

 temperature, i8-2i C. Minimum temperature, 8 C. ; maximum, 

 3o-33 C. 



Habitat. Beer, etc. 



15. Bact. acetosum Henneberg 



L.c., IV, 1898, 14. 



Morphology. Bacilli, 0.4-0.8 : i.o /x, in chains of elements. Optimum temper- 

 ature, 28 C. ; minimum, 8 C. ; maximum, 36 C. Involution forms 

 like B. Pasteur ianum. 



1 6. Bact. xylinum Brown 



Jour. Chem. Soc.. London, XLIX, 1886, 432. 

 Characters as specified in the Synopsis. 



17. Bact. acetigenum Henneberg 



L.C., IV, 1898, 15. 



Morphology. Bacilli, 0.8-1.2 : 1.2-1.4 /" ; n chain formation of the elements ; 

 enlarged ellipsoidal coccoid involution forms. On beer and yeast- 

 water a thin, very tough membrane, which sinks in fragments to the 

 bottom, a new membrane forming; fluid often turbid. With H 2 SO 4 and 

 iodine, often a cellulose reaction of the membrane. According to Henne- 

 berg, bacilli show a rotatory motion. Optimum temperature 38 C. 



1 8. Bact. aceticum (Kruse) 



Bacterium C of sour dough Peters : Bot. Zeitung, 1889. 



Bacillus aceticus-Petersii Kruse : Fliigge, Die Mikroorganismen, 1896, 355. 



Morphology. Bacilli 0.8-1 .6 ^,, rounded pointed, singly and in twos, rarely 



in chains of four. In old cultures, short, swollen involution forms. 

 Gelatin colonies. Round r convex, becoming flatter and more spreading. 



