CHAPTER VI 



COMPOSITION OF VARIOUS TREES. 



" Below the trees unnumber'd rise, 

 Beautiful, in various dyes ; 

 The gloomy pine, the poplar blue. 

 The yellow beech, the sombre yew, 

 The slender fir, that taper grows, 

 The sturdy oak, with broad-spread boughs." — Dyer. 



Acacia (see Locust tree); — The tree called 

 " acacia," commonly planted in England, does not 

 belong to the genus Acacia. It is a North 

 American Robinia, which belongs to the sub-Order 

 Papilionacese. 



Ash {Fraxinus excelsior, Natural Order, 

 Oleacese) is a hardy deciduous tree, with orna- 

 mental foliage. It grows in ordinary soils. 



The ashes of the ash contain in 100 parts : — 



Iron oxide 3 '92 



Manganese dioxide . . 0'41 



Alumina 

 Lime . 

 Magnesia 

 Potash . 

 Soda 



Phosphoric acid 

 Sulphuric acid 

 Chlorine 

 Silica . 



0-63 



25-52 



12-00 



16-02 



7-65 



7-00 



2-52 



103 



23-30 



