LABORATORY AND TEACHING METHODS 635 



Reaction, 1 clay , -> days , 4 days , 10 days 



20 days 



Consistency, slimy, viscid, unchanged. 

 Medium, browned, reddened, blued, greened. 

 Ifih. ferment, present, absent. 



8. Litmus Milk. — Acid, alkaline, acid then alkaline, no change. Prompt rcdiiclion, 

 no redtitlion, partial slow reduction. 



9, 10. Gelatin Colonies. Agar Colonies. — Growth, slow, rapid. 

 (Temperature ). 



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

 Surface, smooth, rough, concentrically ringed, radiate, striate. 

 Elevation, flat, effuse, raised, convex puliinale, umbonalc, crateriform 

 (liquefying). 



Edge, entire, undulate, lobate, erase, lacerate, fimbriate, floccose, curled. 

 Internal structure, amorphous, finely, coarsely granular, grumose, filamen- 

 tous, floccose, curled. 

 Liquefaction, cup, saucer, spreading. 



11. Starch Jelly.- — Growth, scanty, copious. 

 Diastatic action, absent, feeble, profound. 

 Medium stained 



12. Silicate Jelly (Fermis' Solution). — Growth, copious, scanty, absent. 

 Medium stained 



13. Cohn's Solution. — Growth, copious, scanty, absent. 

 Medium, fluorescent, non-fluorescent. 



14. Uschinsky's Solution. — Growth, copious, scanty, absent. 

 Fluid, viscid, non-viscid. 



15. Sodium Chloride in Bouillon. — Per cent, inhibiting growth 



16. Growth in Bouillon over Chloroform. — Unrestrained, feeble, absent. 



17. Nitrogen. — Obtained from peptone, asparagin, glycocol, urea, ammonia 

 salts, nitrogen. 



18. Best media for long-continued growth 



19. Quick tests for differential purposes 



