1888. ] BOTANICAL GAZETTE. 251 
il may originate more or less irregularly, deeper in the rind tis- 
both in a centripetal and centrifugal direction. There ) oe 
however, this difference, the cells cut off toward the circum-— 
Teason for his investigations that, up to that time, the per ; 
won, ** What is the suberin of authors?” had mee eS 
answered ; that there were two principal views on the rs ye at 
the One, that suberin is nothing more than a physica es 
fication of cellulose; the other, that it 1s 1 
form} 
ulose, 
*€ Says suberin is just as distinctly a su 
or lignin, Farther than this, he shows how 1t1s ¢ 
in the wall and how it may be detected. ue 
Consists largely of lignin, that these 
Ma other, the lignin being produce 
© suberin later. lows 
It will be impossible to make clear what fol as 
“Site, Berichte der Wiener Akad. d. w. Nov. 1377. LXXVI I. P- sae 
without — 
