BACTERIOLOGICAL TECHNIC. 83 



2. Potato. 



Growth, scanty, moderate, abundant, transient, persistent. 



Form of growth, filiform, echinulate, beaded, spreading, plumose, arborescent, rhizoid. 

 Elevation of growth, flat, effuse, raised, convex. 

 Luster, glistening, dull, cretaceous. 

 Topography, smooth, contoured, rugose, verrucose. 



Chromogenesis (8) Pigment in water insoluble, soluble; other sol- 

 vents 



Odor, absent, decided, resembling 



Consistency, slimy, butyrous, viscid, membranous, coriaceous, brittle. 

 Medium grayed, browned, reddened, blued, greened. 



3. Loeffler's Blood-serum. 



Stroke invisible, scanty, moderate, abundant. Form of growth, filiform, echinulate, 



beaded, spreading, plumose, arborescent, rhizoid. 

 Elevation of growth, flat, effuse, raised, convex. 

 Luster, glistening, dull, cretaceous. 

 Topography, smooth, contoured, rugose, verrucose. 



Chromogenesis (8) 



Medium grayed, browned, reddened, blued, greened. 



Liquefaction begins in d, complete in d. 



4. A gar Stab. 



Growth, uniform, best at top, best at bottom; surface growth scanty, abundant; restricted 



widespread. 

 Line of puncture, filiform, beaded, papillate, villous, plumose, arborescent: liquefaction. 



5. Gelatin Stab. 



Growth, uniform, best at top, best at bottom. 



Line of puncture, filiform, beaded, papillate, villous, plumose, arborescent. 



Liquefaction, crateriform, napiform, infundibuliform, saccate, stratiform; begins in 



d, complete in d. 



Medium fluorescent, browned 



6. Nutrient Broth. 



Surface growth, ring, pellicle, occulent, membranous, none. 



Clouding, slight, moderate, strong; transient, persistent; none; fluid turbid. 



Odor, absent, decided, resembling 



Sediment, compact, occulent, granular, flaky, viscid on agitation, abundant, scant. 



7. Milk. 



Clearing without coagulation. 

 Coagulation prompt, delayed, absent. 



Extrusion of whey begins in days. 



Coagulum slowly peptonized, rapidly peptonized. 



Peptonization begins on d, complete on d. 



Reaction, id , 26. , 4d , lod , 2od 



Consistency, slimy, viscid, unchanged. 

 Medium browned, reddened, blued, greened. 

 Lab ferment, present, absent. 



8. Litmus Milk. 



Acid, alkaline, acid then alkaline, no change. 

 Prompt reduction, no reduction, partial slow reduction. 



9. Gelatin Colonies. 

 Growth slow, rapid. 



Form, punctiform, round, irregular, ameboid, mycelioid, filamentous, rhizoid. 



