218 BACTERIOLOGY 



Bouillon. Turbid, becoming clear. 



Ptpton rosolic acid. Slightly darker in 10 days. 



Litmus milk. Amphoteric to 'slightly alkaline. Indol not produced. 



Habitat. Soil. 



33. B. alcaligenes Petruschky 



Centralblatt f. Bakteriol., XIX, 1896, 187. 



Morphology. Bacilli have perithrichic flagella. Indistinguishable from B. 



typhosus, except in the alkaline reaction in milk (not invariably constant). 



Differentiated also by the serum reaction. 

 Potato. Growth brown. 

 Habitat. Faeces. 



34. B. Friedbergensis Gaffky-Paak 



See No. 37. 



35. B. solanacearum Smith 



U. S. Dept. of Ag., Div. Veg. Path. Bull., XII, 1896. 



Morphology. Bacilli 0.6-1.0 /*, variable; flagella several. 



Gelatin colonies. Deep : round, yellowish to brownish, granular, entire. Sur- 

 face: round, thin, white. 



Gelatin stab. In depth, growth scanty ; on the surface, growth thin, white. 



Gelatin slant. Growth white, smooth, moist, glistening, with finger-like ex- 

 tensions into the gelatin. 



Agar slant. Growth smooth, white, moist, glistening, becoming yellowish 

 brown to brown ; agar stained brown. 



Bouillon. Zoogloea in the upper layer ; uniform turbidity on shaking. 



Potato. Growth dirty white, becoming brownish to smoke-black. 



Milk. Not coagulated, slowly saponified to a yellowish, translucent fluid. 



Litmus milk. Rendered alkaline. Grow at 40 . 



Glucose bouillon. No acid or gas production. 



Bouillon. Rendered alkaline. 



Habitat. Associated with a disease of tomato, egg-plant, and the Irish potato. 



36. B. Weichselbaumii 



B. ai/uatilis-sulcatus No. 5, Weichselbaum : Osterreichische Sanitatswesen, 1889. 

 B. aquatilii-sulcatus Kruse : Fliigge, Die Mikroorganismen, 1896, 410. 



Morphological and cultural characters like B. typhosus. Diff. aerobic; 



in depth, in gelatin stab cultures, little or no growth. Do not reduce 



nitrates. Non-pathogenic. 

 Habitat. Water. 



