Compound Celluloses 2OI 



(1) From analyses of HC1 precipitate : 



C 24 H 24 (CH 3 ) 2 SO 12 . 



(2) Calculated from analyses of PbO compounds : 



(3) From direct analyses of gums obtained from PbO pre- 

 cipitates : 



(a) Precipitated by alcohol : C 24 H 24 (CH 3 ) 2 SO, 2 . 



(b) Soluble in aqueous alcohol : C 24 H 24 (CH 3 ) 2 SO,2. 



(4) Brominated derivative : 



The S is present in this complex as a sulphonic residue 

 (SO 3 H) ; the parent molecule, i.e. the non-cellulose or lignone 

 complex of pine wood, may be regarded as approximately 

 C 24 H.2 4 (CH 3 ). i O 1 o. Certain definite conclusions may be drawn 

 from this empirical study of its derivatives. 



(1) It is evident that it represents a highly condensed 

 molecule. Taking the 'carbohydrate' formula to which it 

 most nearly approximates, viz. C 24 H 24 Oi 2 , this represents 



4 C 6 H 12 O 6 -i2H 2 O. 



In addition to condensation expressed by dehydration, 

 CH=CH groupings are also represented, as appears from 

 the bromination of the product. The authors not having 

 prepared the corresponding chlorinated derivative, we are not 

 able to compare the grouping of the hexene rings of this com- 

 plex with those of jute, especially as the reactions of the 

 chlorinated wood are distinct from those of jute. There is, 

 however, an unmistakably close general similarity. 



(2) It is evident that the condensation is of a type which 

 resists hydrolytic treatment of a very energetic character ; and 

 that the constituent groups of the lignocellulose are united 

 together by stronger bonds of synthesis than O-linking. 



