COMPOSITION OF VARIOUS TREES 99 



The elm is a valuable timber tree. 

 The ashes of the wood and bark contain in 

 100 parts : — 



One ton of elm extracts 25 lbs. of mineral 

 matter from the soU. 



The dried inner bark (liber) of the tree is used 

 in medicine as a decoction. It contains 3 per 

 cent, of tannic acid, and 20 per cent, of muci- 

 laginous matter. The inner bark of the slippery- 

 elm {Ulmus fulva) abounds in mucilage. It 

 makes a nutritious jelly and demulcent poultices. 



Euonymus {Euonymus europceus, Natural 

 Order, Celastrinese) grows in ordinary soils. The 

 ashes of the wood and root-bark contain in 100 

 parts : — 



H 2 



