APPARATUS, MATERIAL, AND REAGENTS. 13 



22. Magenta solution (Gibbes). 



Magenta . .2 



Aniline oil 3 



Alcohol (Sp. Gr. -830) . . 20 



Distilled water. . . 20 



23. Methylene blue. 



(a) Concentrated alcoholic solution. 



(b) Aqueous solution. 



Methylene blue .... 2 

 Alcohol .... -15 



Water 85 



(c) Koch's solution. 



Concentrated alcoholic solution of 



methylene blue . . * ' i 



Ten per cent, potash solution . . 2 



Distilled water .... 200 



(a} Loffler's solution. 



Concentrated alcoholic solution of 



methylene blue .... 3 

 Solution of potash i 10,000 . .100 



24. Methyl violet. 



(a) Concentrated alcoholic solution. 



