APPENDIX B 



THIS appendix includes in a tabular form, as being convenient 

 for reference, the more important reactions of the parts of the 

 vegetable cell, and of bodies commonly contained in it : references 

 are given in the case of the more important reactions, to the pages 

 in the text where descriptions are to be found for carrying out the 

 tests on suitable material. 



Cellulose Cell-walls. 

 i. Coloured faintly yellow by iodine (p. 36). 



ii. Swollen and ultimately dissolved by sulphuric acid (p. 36). 



iii. Coloured blue with iodine and sulphuric acid (p. 36). 



iv. Coloured blue or violet with chlor-zinc-iodine (p. 37). 

 v. Swollen and dissolved by ammoniacal solution of cupric 

 hydrate (p. 37). 



vi. Stained by solutions of carmine or of hsematoxylin which 

 contain a mordant, by methylene blue, and in various degrees by 

 other aniline colours. 



Lignified Cell-walls. 



i. Coloured distinctly yellow by iodine (p. 38), and by chlor- 

 zinc-iodine (p. 39), but in the case of bast-fibres the tint may 

 vary to sherry brown, or even pink (p. 95). 



ii. Coloured brown and swollen by iodine and sulphuric acid. 



iii. Coloured bright yellow by acidulated solution of aniline 

 sulphate (p. 39). 



iv. Coloured red with acid solution of phloroglucin (see Appen- 

 dix A). 



v. Coloured green when exposed to light after treatment with 

 carbolic and hydrochloric acids (see Appendix A). 



