48 ACCOUNT GIVEN BY BOITEL. 



bulky head, succumb easily to the action of strong winds, if there 

 be removed, all at once, neighbouring trees which had served to 

 shelter and protect them. 



" The space which should be allotted to pines depends on their age, 

 the vigour of their vegetation, and the nature of the products which 

 it is desired they should yield. 



" Delamarre, in Normandy, allows the following spaces round the 

 trees : 



1st eclaircie at the age of 7 years, ... 0'33 metres. 



2nd „ „ 8 „ ... -66 to 1 metre. 



3rd „ „ 12 „ ... 1-33 metres. 



4th „ „ 16 „ ... 1-66 „ 



5th „ „ 20 „ ... 2- 



6th „ „ 24 „ ... 2-33 „ 



7th „ „ 28 „ ... 2-66 „ 



A mfetre is equal to nearly 40 inches. 

 " In Gascony pines destined for tapping for resin are allowed a space 

 all round them. 



At 20 years of age, ... ... 3 mfetres. 



„ 25 „ ... ... 4 „ 



„ 40 „ 5-50 „ 



„ 35 to 60 years of age, ... ... 7 „ 



" Timber woods of pines submitted to a definitive tapping contain 

 about 200 trees to the hectare of nearly 2| acres." 



Magageov pruning, in its application to the maritime pine, consists 

 in removing one or more couronnes or tiers of branches, beginning 

 with the lowest. Although the maritime pine appears to support 

 amputation better than do most other resin yielding trees, " I have 

 always observed," says Boitel, " that the removal of a certain number 

 of couronnes was hurtful to the vigour and the health of the trees. 

 The leaves play an important part among the nutritive organs ; and 

 if pruning do more harm to resinous trees than to broad leaved trees, 

 which put forth new buds on the old wood, this must without doubt 

 be attributable in a great measure to this — that the growing trees do 

 not produce in place of the amputated branches young shoots, the 

 leaves of which might discharge the functions of those which have 

 disappeared by the operation of pruning. Pruning has, moveover, 

 the inconvenience of leaving in the trunks running sores, which are 

 healed with difficulty, and are the occasion of a pretty considerable 

 loss of sap. 



