56 



which the transparent sanies news attains the appear- 

 ance of chalk. becoming while, triable, crystalline, 

 alkaline, ami effervesoem with acids. A n:a.ri.:zer 

 exhibits the crystals in :he iris :: rhomboids aid 



Venerable matter . . . 60.5 



Carbonate of potass . . . 34.2 



Carbonate of Hme . . . 5.0 



Carbonate if Marnesia . . 0.3 



100.0 



Van cu elm calculated from the quantity of this 

 white matter that was ibumi about the canker of an 

 elm. that 5001b. weight if its weed must have been 

 destroyed.* There is no dinbt tuat such a discharge 

 is deeply injurious to the tree : but the above learned 

 chemist appears to have largely erred, tor he caleu- 



* Amiles de CLiziie. ixi. 30. 



