RE-STOCKING DENUDED WOODLANDS. 



205 



the dead leaves, be formed a layer upon which will grow 

 mosses and lichens, which, when decayed, under the 

 assistance of the many earthy particles, left by reiter- 

 ated inundations, help to cover the stony surface in the 

 course of time with such good humus soil as to enable 

 us to raise, later, more valuable forest-trees. 



