ee vee. 4 
there are similar cells and a single lacuna. The rést of the 
parenchyme is cellular and of no special interest. The lower 
surface of the leaf is composed of.a row of small cells which” 
yield no mucilage‘on boiling. - og 
A transverse section of the young stem shows an epidermis 
and scanty suber, beneath which are a number of rows of tangen- 
tially extended cells, and then two or three rows of parenchyme 
cells containing chlorophyll and oil globules, amongst which 
are some cells containing crystals of calcium oxalate. Next 
comes a thick liber, in which are groups of stone cells and 
. some cells containing calcium oxalate. The wood is porous, 
_and the pith also shows cells containing oxalate. In the old 
bark, in the cells beneath the chlorophyll cells, are” tangen- 
tially extended lacunze “containing mucilage, which absorb @ 
large part of thetissue; the suber and liber are much deve- 
_ with the medullary rays. (Heckel and Schlagdenhauffen.) 
_blue or yellow, showing the absence of starch and albumenoid 
. and treated with - alcohol, yields an abundant ‘gelatinous pre- 
cipitate. It is also precipitated by neutral plumbic acetate, 
* 
‘and when treated with nitric acid yields mucic and oxalic . 
acids. The pulp exhausted by petrgleum ether affords a light _ 4 
‘water, and is not coloured by ferric chloride ; chloroform 
_ According to Heckel and Schlagdenhauffen, the following 1§ 
A in 
loped, and large groups of stone cells are seen in’ connection 
Chemical composition:—Mixed with water artd treated with 
a drop of iodised iodide of potassium, the pulp is not coloured 
= eek: 
principles, but the water forms a mucilage which, when filtered “ 
chloride of zinc, ferric chloride, and the chlorides of barium, ; 
strontium, and lime. The watery solutidn has an acid reaction, 
yellow extract, which contains traces of resin, is insoluble m — 
removes from it @ similar extract, but of a enish colours 
owing to the presence of a trace of chlorophyll. Thealcoholic 
extract is of a reddish-brown colour and partly soluble in 
- water; the insoluble portion re-dissolved in alcohol is coloure 
bluish-green by ferric chloride ; the soluble portion is coloured — 
red by the same reagent, and reduces freely Fehling’s solution? | 
* 
the composition of the pulp — . 
