248 ELEMENTS OF SYLVICULTUKE . 



It will doubtlessly be found that numerous details 

 have been omitted on the subject of artificial re- 

 stocking ; but it must not be forgotten that our object 

 is to impart general notions, and not to write a 

 complete treatise on these matters. For this reason 

 the re-stocking of lofty mountain chains ravaged by 

 torrents has been passed over in silence. It should 

 form the subject of a special work. 



SUPPLEMENT. 



NOTES ON THE FIXING OF THE DUNES 

 AND THE TAPPING OF THE CLUSTER 

 PINE (P. PINASTEE) FOR RESIN. 



[In the summer of 1872, the author, in company 

 with the director of the Forest School and of one o. 

 the other professors, paid a visit to the dunes, be- 

 tween Bayonne and la Tremblade, and the following 

 is his interesting account of the methods employed 

 for fixing the dunes, including the treatment of the 

 Cluster Pine for its resinous products. TKS.] 



On the low and sandy coasts between the mouths 

 of the Adour and the Gironde, every tide leaves 

 behind it quantities of fine sand. The sand is con- 

 tinually drifted inland by the wind, and forms moving 

 hills, which sometimes attain a height of 230 feet ; 

 these hills, as we should naturally expect, have a 

 gentle inclination on the side of the sea, but descend 

 abruptly towards the interior ; sometimes they are 

 long, continuous, and disposed in regular and parallel 



