WRIGHT: THE GENUS DIOSPYROS 
and when sufficiently thin the section is removed and 
finally polished on a razor stone. This method allows one 
to obtain fairly large sections, though smaller sections cut 
by hand in the ordinary way provide ample material for 
obtaining all points in detail. 
BUtology of the Timber ,.-The anatomy of the secondary 
zylem of the Ceylon species of Diospyros is of the ordinary 
arborescent dicotyledonoos type. The differentiation of the 
tracheal elements and fibres is remarkably uniform, bnt 
the parenchymatous tissues exhibit sufficient variation to 
" ° ag ™’ , P‘”« o£ ‘he various species under different 
.STt r 8 With the * gWtaa “> size, form, and 
percentage number of the secondary xylem elements one 
■nnstallowforvariabimy even for members of the same 
• ’ ey ma - v bave developed under quite dis- 
at g ',a t ‘“!! 8 “ d ! h6 ; r mterMl re fi nir ementB are probably 
been made in a general ** “ P ° S3ib ‘ e ‘ he statements 
to obtain material of th ^ Wh ® re has1)6611 P ossible 
Tracheal Elements. 
wh ° uy by 
“ d when pre8ent 
ing to the speci^the^ 7"** 
climatic conditions uni, w £ch“* ** 
Usually the vessels occur in am ^ grown ‘ 
£T ° ,the f8W *- 
e^^r 8p r tebeeh “ 
*- « cells. D.“e T r‘l! ttd *«»• »f 
occurring in groups, form ats ^ wh “ 
thickness ; in others, notably D 0,,r C ® 118 in radial 
contain twenty members arranged^ * 
