WOODS. 



179 



PLATE LXXIX. 



FIG. 89. -Powdered Red Sanders Wood (x 240) 



cr, Prismatic crystals of calcium oxalate. 

 fl, Wood-fibres, longitudinal aspect. 

 pi, Wood parenchyma cells. 

 rm, Medullary rays in transverse section. 

 r'm , The same in tangential section. 

 ten, Superposed crystal cells. 

 v, Vessel cut longitudinally. 

 V, Vessel cut transversely 



