CONTENTS. 



Page. 



Quantity and value of imported sumac 5 



Culture and preparation for market 6 



Nature of adulteration 7 



Investigation of 1905 8 



Securing samples for analysis 8 



Methods of examination 8 



Discussion of results of analysis 10 



Investigation of 1907 20 



Discussion of analytical data 20 



Comments by importers 21 



Detection of adulteration 26 



Notes on the microscopical examination of Sicilian sumac and its adulter- 

 ants 26 



Apparatus and reagents 26 



Technique 27 



Some histological features 28 



Sicilian sumac (Rhus coriaria) , 28 



Lentiscus (Pistacia lentiscus) 29 



Tamarisk ( Tamarix africana) 30 



Smooth sumac (Rhus glabra) 30 



Chemical determination of adulterants 30 



Extent of adulteration 32 



117 (3) 





