Compound Celluloses 



207 



Both are formed continuously, and increase towards the end 

 of the distillation. Special observations were also made on 

 the yield of acetic acid from oak (183 grms. of wood), with the 

 following results : 



On comparing the woods with one another the only very 

 noteworthy feature of difference is the very large yield of 

 methyl spirit obtained from alder wood. The acetic acid re- 

 sults are approximately constant for this series of woods. 



In regard to the aromatic products it is important to note 

 the predominance of pyrogallol derivatives, and that many of 

 these are characterised by the OCH 3 group. 



