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AMERICAN MUSEUM (AIDE LEAFLETS 



Pith Ray 

 as seen in 

 tangential cut 



Pith Rav 

 as exposed by 

 radial cut 

 (The Pith Rays 

 produce the 

 silver grain 

 of the wood 



FIG. 18. RELATIVE POSITION OF PITH RAYS AND WOOD RINGS 



Iii a radial cut, the pith rays may show as broad bands (silver grain); in a 

 tangential cut, they appear only as short lines. Compare with Figs. !!• and 20 



FIG. 19. OAK WOOD SHOWING PITH RAYS 



Narrow radiating lines in cross section, broad silvery hands in the quartered 



wood. Compare with Fi<;s. Is and 2(1 



