14 BACTERIOLOGY. 



(b) Aqueous solution. 



Methyl violet . . . . 2.25 



Distilled water . . . .100 



(c) Koch's solution. 



Aniline water . . . . .100 

 Alcoholic solution of methyl violet 1 1 



Absolute alcohol . . . .10 



25. Neelsen's solution. 



Dissolve fuchsine i 



In a 5 per cent, watery solution of 



carbolic acid . . . .100 



Add alcohol . . . , .10 



26. Nitric acid, pure. 



27. Orseille (Wedl). 



Dissolve pure ammonia-free orseille in 

 Absolute alcohol . . .20 

 Acetic acid .... 5 

 Distilled water .... 40 

 until a dark red liquid results : filter. 



28. Picric acid. 



(a) Concentrated alcoholic solution. 



(b) Saturated aqueous solution. 



