LABORATORY AND TEACHING METHODS 63 



Reaction, i day , 2 days , 4 days , 10 days 



20 days 



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

 (Temperature ) . 



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

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

 Elevation, flat, effuse, raised, convex puhinate, umbonate, 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. Corn'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 



