MUSTARD. 



Ill 



confounded with a medicinal bark called Winter^s Bark, or 

 Drimys Winteri, but it is quite distinct from it. The im- 

 ports are very small and occur irregularly. 



Mustard.— The seeds of Sinapis nigraj often mixed with 

 Sinapis alba, (Nat. Ord. Crucifer^e,) 



The small round seeds of these two species of Sinapis 

 are crushed between rollers, and then pounded in mortars ; 

 it is then sifted through a fine sieve, and yields a coarse 

 flour of mustard, which is again sifted through a finer sieve, 

 and the product is the flour of mustard in common use. It 

 is often adulterated with the seeds of the Charlock or Wild 

 Mustard {Sinapis arvensis), and wheaten flour is also added 

 for the same purpose. The outer skin of the seeds, sepa- 

 rated by the siftings, forms a coarse poAvder, which, under 

 the initials P. D. [i. e, pepper-dust), is sold for adulterating 

 pepper, and is also used for expressing the fixed Oil of 

 Mustard. Mustard-seed is largely imported from the East 

 Indies for the expression, of oil ; and white mustard-seed is 

 imported from Northern Germany in small quantities, for 

 grinding with the black mustard-seed grown in this country. 



There are a few seeds which, from their pungent aromatic 



