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Cincinnati Society of Natural History. 



Bouillon. — Medium remains quite clear, but flocculi appear 

 after several days. These finally settle to the bottom, form- 

 ing a pink precipitate. 



Glucose Bouillon. — No gas. Moderate cloudiness in open 

 arm. No surface growth. Pink precipitate at bottom. 



Milk. — No change during whole month. 



Potato. — Exceedingly slight pink growth. This soon dries 

 up. If kept in moist chamber, an abundant growth takes 

 place, which shows granular structure and has a light red 

 color. 



Morphology. — Small bacillus. Actively motile, with dart- 

 ing movement. Varies somewhat in size. Ends rounded. 

 Single. Spores doubtful. Length, 2.2 v. Width, 1 



Gelatin Stab. — No liquefaction. Growth moderate and 

 decreases rapidly downward. Surface growth increases 

 slowly, and finally becomes dry and wrinkled. Yellow. 



Glucose Gelatin. — Media clear. No gas. 



Gelatin Slant. — Slight growth, which becomes abundant in 

 time. Smooth and shiny. Edges minutely dentate. Yellow. 



Agar Slant. — Growth becomes quite abundant in time. 

 Forms a thin, dry -sheet. Yellow, i. e., darker than sulphur. 



Bouillon. — Cloudy and flocculent. Finally heavy yellow 

 precipitate. 



Milk. — No change. 



Potato. — Growth becomes abundant and spreading. Dark 

 yellow color. Potato turns blue. 



A 7 . 



Morphology. — Bacillus ; plump with rounded ends. Single 

 and pairs with short chains in old cultures. Chains are fre- 

 quently branched. Motile (?). Stains readily. Length, 3.5 

 fj.; width, 1.5 p-. 



Gelatiyi Stab. — Slight growth along needle track, which 

 remains nearly transparent, and becomes granular with age. 

 Also slight surface growth which increases slowly. White. 

 No liquefaction. 



Glucose Gelatin. — Media remains clear. No gas. 



Agar Slant. — Slight white growth, irregular, dry, and 

 granular. Restricted. 



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