252 ELEMENTS OF SYLVICULTURE . 



made of the non-injected sapwood of the Cluster Pine. 

 The expense of keeping it in repair and raising it is 

 about one penny a year per running foot. The price 

 of a foot of fencing is about three farthings and a 

 half, and a new fence must be put up nearly every 

 year. 



If, notwithstanding these precautions, the wind is 

 apt to make breaches in the littoral dune, other rows 

 of paling, making a given angle with the first, are 

 erected on the steep side. At the present day may 

 be seen a littoral dune, in capital order, along a 

 coast line of more than 200 kilometres reaching from 

 the bar of the Adour to the mouth of the Gironde. 



A protecting wall against the wind being once 

 obtained, the moment has arrived for beginning 

 sowing operations on the inner dunes. This is done 

 by scattering broadcast a mixture of the seeds of the 

 pine, the common broom (Sarothamnus scoparius), 

 the furze (Ulex nanus) and the Psamma arenaria. 

 In the operations carried on by the State, the 

 quantity of seed to be used per acre is ninety-eight 

 pounds of the pine, eight pounds of the broom, and 

 three and a half pounds of the Psamma arenaria. 

 Over the whole is spread a covering of broom, furze, 

 and other brush wood. One man unties the bundles, 

 while two others spread them out, and a fourth 

 throws on a spadeful of earth at intervals of twenty 

 inches to keep the brushwood down. This covering 

 is essential for preventing the seeds, and especially 

 the sand, from being blown away by the wind. Furze 

 is preferable to the broom, as it yields a richer 

 manure by its decomposition. 



