BOTANICAL: THE UPPER CLASSES. 



165 



There are those who would tell us, in the cold stony 

 language of unbelief, that this was simply a ; " law of 

 nature." To such I would say, " So it is ; but tell me, 

 who is what you call ' Nature ' ? Where does she live ? 

 To what country does she belong? Is not 'Nature 1 

 onlv another name for God ? " 



Circulation in a leaf. 



To observe the marvellous circulation in a leaf, the 

 Vallisneria affords one of the best of opportunities. A 

 small piece should be cut vertically, then from the same 

 piece a horizontal slice, and, when placed under a high 

 power, the flow of the vital fluid will be seen, with proper 

 illumination, after the manner of the cut above, in 

 which the arr6ws show the direction of the currents; 

 a, a, a, the cellular tissues ; b, b, I, I, the vessels in which 



