On the Sec?'etion of the Leaves and Stems of the Ice-plant. 3 



cated by the above reactions. They likewise show the presence 

 of chloride of sodium, potash, sulphuric acid and magnesia. 



In comparing this secretion of the leaves of the Ice-plant with 

 the fluid in the ascidia of Nepenthes, we find a material difference 

 in their respective compositions, as will be seen by the annexed 

 table, which exhibits the composition of both fluids : 



Composition of the fluid in the Composition of the watery secretion 

 ascidia of Nepenthes. of the leaves of Mesembryanthe- 



mum crystallinum. 



Organic matter, chiefly malic and a Organic matter (albumen, oxalic 



little citric acid. acid, &c.). 



Chloride of potassium. Chloride of sodium. 



Soda. Potash. 



Lime. Magnesia. 



Magnesia. Sulphuric acid. 



