; aehl's test. 



Products of bacil- Concentrated sulphur- Rose color deepen- 

 lus cholerae asi- , ic acid. ing into purple, 



aticae. 



Add 10 drops R. to 7 This is the indol- 

 c. c. pure culture of reaction ; other 

 the comma-bacillus. bacteria elabor- 

 ate indol, but the 

 com ma-bacillus 

 and one or two 

 others elaborate 

 nitrous acid also, 

 which is neces- 

 sary for the reac- 

 tion. 



1 )hl's test. 



Globulin. 



(a) A m m o n i u m hy- 

 drate, (b) Sat. sol. 

 ammonium sulphate. 



Precipitate. 



Alkalinize with a; fil- 

 ter after several 

 hours ; add equal j 

 part b to filtrate. 



Picric acid. 



Yellow color. 



Soak woolen thread in 

 the liquid and rinse 

 in water. 



Glucose. 



(a) Sol. ferric chlorid. 

 {b) Sol. sodium hy- 

 drate, (c) Sulphuric 

 acid, (d) Fresh sol. 

 potass, ferricyanid. 



Blue color. 



Shake liquid with 4 

 c.c. water, 1 drop a, 

 and 6 drops b ; boil ; 

 add 2 drops c. Let 

 cool ; add d. 



; test. 



Melanin. 



See Von Jaksch' s test. 



11 m-brom id- 



Potass, bromid in 

 urine, etc. 



(a) Chlorin-water. (b) ■ Yellow color. 

 Chloroform or car- 

 bon disulphid. 



Add a and b. 



-ferrocy- Albumin in urine. 



See //tiger's test. 



im-hydrate- i Chrysophanicacid Potassium hydrate. 

 I (rhubarb, senna) 



am-hydrate- Santonin (its deri- 

 vatives). 



Potassium hydrate. 



Reliable but not 

 delicate. 



Red color. Add R. to urine, or, 



better, to ethereal 

 exti act (Penzoldt), 



Red color. 



Add R. to urine. 



Distinguished from 

 chry sophanic 

 acid by reaction 

 not being ob- 

 tained with 

 ethereal extract. 



Glucose in urine. 



Potass, hydrate 2.5, 

 liquid potass, sili- 

 cate (concent.) 60, 

 potass, bichrom. 2. 

 Allow 5 drops of this 

 mixture to dry on 

 strip of tin. 



Green color. 



Heat tin, R. turns yel- 

 low ; add urine: 

 green color if glu- 

 cose present. 



