232 



c.c. of urine ; boirfor three minutes ; cool ; crystals 

 separate out in a few minutes up to one hour. This 

 is an exceedingly delicate test. 



ig- 73- Spectra of (i) 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. 



