122 BACTERIOLOGY 



a. Oa sterile beer or beerwort a membrane over entire surface. 

 * Membrane stained blue with iodine solution. 



f Cultures in beer, yeast-water, or dextrose solution remain 

 clear. 



1 1 . Bact. Pasteurianum (Hansen) Zopf. 



f f Cultures in beer, yeast-water, or dextrose solution turbid 

 below the membrane. 



12. Bact. Kutzingiatium Hansen. 



** Membrane not stained blue with iodine solution. 



f Membrane on beer, yeast-water, and dextrose solutions 

 rather thin. Fluid below the membrane more or less 

 turbid. 



13. Bact. Hansenianum. 



14. Bact. oxydans Henneberg. 



ft Membrane on beer, yeast-water, and dextrose solution 

 thick and gelatinous, not easily broken; fluid below the 

 membrane clear. 



15. Bact. acetosum Henneberg. 



fff Membrane on beer, yeast-water, and dextrose solution 

 thick, tough, and coriaceous, showing a cellulose reaction 

 with iodine and sulphuric acid. 



1 6. Bact. xylinum Brown. 



b. On sterile beer or beer-wort an imperfect membrane as islands. 



Motile, with a polar flagellum. See Pseudomonas flagellatum 

 Zeidler. 



2. Do not form long chains of more than four elements, or elongated 

 involution forms. 



17. Bact. acetigenum Henneberg. 



18. Bact. acettcum (Kruse). 

 II. Aerobic and facultative anaerobic. 



A. Gas generated in glucose bouillon. 



i . Gas generated in lactose bouillon abundantly. 



a. Milk rendered viscous slimy. 



19. Bact. viscosum van Laer. 



b. Milk coagulated, but not rendered viscous slimy. 

 * Bouillon rendered turbid. 



20. Bact. aerogenes Escherich. 



BACT. AEROGENES GROUP * 



21. Bact. capsulatum (Sternberg). 



22. Bact. chincnse (Hamilton). 



