FOREST EXPLOITATION. 27 



such a way that a definite idea may be formed of what 

 the improved system of exploitation is, and of wherein it 

 differs from Jardinage, felling a tree here and there as 

 required, and from Exploitation h tire et aire, the progres- 

 sive felling of adjacent areas. 



I have spoken of a virgin forest to be subjected to the 

 forest regime. But there are other cases, some or all of 

 which much more frequently exercise the skill of the 

 forest administrator. It may be required of him to 

 subject such a forest to the coppice wood regime, or a 

 coppice wood to the timber forest regime, or a forest which 

 has been subject to the timber forest regime to the coppice 

 wood regime, or a mixed coppice and timber forest to either 

 a simple timber forest or a simple coppice wood regime, or 

 to convert a timber forest or coppice wood into such a 

 mixed coppice and timber forest, or a forest which has 

 been treated by Jardinage into simple coppice, into mixed 

 forest and coppice, or into simple timber forest, or a timber 

 forest or coppice, or one which has been subjected to exploi- 

 tation according to La Meihodea tire et aire, into one or other 

 of these conditions all with a view to subsequent exploi- 

 tation according to the Fachwerke Method, or Methode des 

 Compartiments. 



All such operations afford scope more ample scope 

 than does the hypothetical case previously supposed, for 

 the exercise of the forester's skill, but instructions are 

 given in many of the Schools of Forestry for example, in 

 the school at Nancy, in France in regard to what should 

 be done in each and all of the cases mentioned ; and these 

 instructions are simply appropriate applications to each 

 case of the general principles an exposition of which has 

 been given. 



In the instructions given, as in instructions given in a 

 school of surgery, of medicine, or of law, all that is done, 

 and all that can be done, is to demonstrate and establish 

 general principles, with illustrations of their applicability, 

 and of their application to certain definite cases, instruc- 



