[ >64 ] 



menium., or promoter of digeftion, than as a pabulum. This idea 

 is fuggefted by the fmallnefs of their quantity, and the offices 

 they are known to perform. Their quantity is always fmaller 

 than that of earth, and this we have already feen to be ex- 

 ceeding fmall. 



Thus one thoufand pound of \b^ 



Oak gives of faline matter only - 1,5 



Elm - - - 3,9 



"Beech - - - 1,27 



Fir - - 0,45 



Vine branches - - 5,5 



Fern - - 4>25 



Stalks of Turkey wheat - - 17,5 



Wormwood - - 73' 



Fumitory - - 79» 



Trifolium pratenfe - - 0,78 



Vetches * - - - 27,5 



Beans with their ftalks * - 20, 



In all the experiments hitherto made the proportion of faline 

 matter to the earthy has been found fmalleft in woods. In 



other 



• 3 Ruck. 49. 



