FRENCH FIR MANAGEMENT IN THE VOSGES 549 



the needs of a time when the scarcity of sawlogs of all sizes is making 

 itself felt. ... To sum up, in the case of the forest considered our 

 method leads to a type of stand with an average hectare in the middle 

 of the cutting cycle of 400 trees 20 cm. and over, scaling 265 cubic 

 meters. This stock produces annually 10.65 cubic meters, or 4.02 per 

 cent on the volume, if one includes the trees not inventoried passing 

 to the 20 cm. class, and a money return of 3.05 per cent, allowing for 

 the soil value, costs, etc. 



It is carried out automatically (so to speak) by the application of the 

 spacing formula, which is the fundamental idea. 



