144 SCIENTIFIC AND APPLIED PHARMACOGNOSY 





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FIG. 64. A mixture sold as ground black pepper: A, stone cells of olive endo- 

 carp; S, corn and wheat starch grains; B, stone cells of pepper hulls; C, 

 fragments of seed coat and pericarp of cayenne pepper; L, crystals of calcium 

 sulphate which separate on mounting the specimen in 25 per cent sulphuric 

 acid. 







