MUSTARD. Ill 



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

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

 ports are very small and occur irregularly. 



Mustard. — The seeds of Sinapis nigra, often mixed with 

 Sinapis alba. (Nat. Ord. Cruciferce.) 



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 

 Hour 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 arve?isis), and wheaten flour is also added 

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

 rated by the siftings, forms a coarse powder, 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 



