2 3 2 
c.c. of urine ; boil for three minutes ; cool; crystals 
separate out in a few minutes up to one hour. This 
is an exceedingly delicate test. 
Fig. 73 . Spectra of ( 1 ) Haematoporphyrin (in acid Solution) ; 
( 2 ) Haematoporphyrin in Alkaline Solution ; ( 3 ) in Neutral 
Solution ; ( 4 ) Haematoporphyrin ( urate-sediments ) 
The Detection of Quinine in the Urine* 
The detection of quinine in the urine is of im¬ 
portance in connexion with the property that this 
* Kleine. Zeitscbrift fur Hygiene . Bd. xxxviii, H. 3, s. 460. 
