38 



11. Bacterium annulatum A: good growth; vigorous evolution of gas 



on addition of acid; nitrate content greatly diminished; 



Strong formation of nitrite. 



12. Bacterium annulatum B: good growth; vigorous evolution of gas 



on addition of acid; nitrate content greatly diminished; 



Strong formation of nitrite. 



13. Bacillus aquatile: good growth; vigorous evolution of gas on addi- 



tion of acid; nitrate content greatly diminished; 



Strong formation of nitrite. 



14. Bacillus arborescens: good growth; vigorous evolution of gas addi- 



tion of acid; nitrate content greatly diminished; 



Strong formation of nitrite. 



15. Bacillus argentinensis: good growth; moderate evolution of gas on 



addition of acid; nitrate content slightly diminished; 



Weak formation of nitrite. 



16. Micrococcus ascoformans: fair growth; slight evolution of gas on 



addition of acid; nitrate content not greatly diminished; 



Weak formation of nitrite. 



17. Bacillus asterosporus: scant growth; slight evolution of gas on 



addition of acid; nitrate content not greatly diminished; 



Weak formation of nitrite. 



18. Bacterium aurantiacus: good growth; no evolution of gas on addi- 



tion of acid; nitrate content unchanged; 



No formation of nitrite. 



19. Sarcina aurantiaca: scant growth; no evolution of gas on addition 



of acid; nitrate content unchanged; 



No formation of nitrite. 



20. Bacillus Baccarinii: fair growth; slight evolution of gas on addition 



of acid; nitrate content slightly diminished; 



Weak formation of nitrite. 



21. Bacterium beticolum: good growth; vigorous evolution of gas on 



addition of acid; nitrate content greatly reduced; 



Moderate formation of nitrite. 



22. Micrococcus brunneus: moderate growth; slight evolution of gas 



on addition of acid; nitrate content not greatly diminished; 



Weak formation of nitrite. 



23. Bacillus budapestiensis: good growth; no evolution of gas on addi- 



tion of acid; nitrate content very slightly diminished; 



Very weak formation of nitrite. 



24. Bacillus butyricus: good growth; no evolution of gas on addition 



of acid; nitrate content unchanged' 



No formation of nitrite. 



25. Bacillus candicans: moderate growth; no evolution of gas on addi- 



tion of acid; nitrate content unchanged; 



No formation of nitrite. 



26. Micrococcus candicans: moderate growth; no evolution of gas on 



addition of acid; nitrate content unchanged; 



No formation of nitrite. 



