BABKS. 



205 



ot. 



FIG. 100. Powdered Quillaia Bark (x240). 



a, Starch grains. 



ccr, Crystal cells. 



cr, Crystals of calcium oxa'ate. 



fl, Bast fibres. 



I, I', Bast. 



rm, r'm', r"m", Medullary rays in longitudinal, transverse, and 



tangential sections. 

 s, s', Cork. 

 sc, Sclerenchymatous cells. 



