FORESTS WOEKED A TIRE ET AIBE; 201 



bf Combined, comprdmised Avliole crops in various vays and deorees 

 After what we have just sitid, it i.s easy to understand Iiow cer- 

 tain forests of our plains have been brought into a state of the 

 Titmost irregularity. The effects produced continue to manifest 

 themselves even now, lonw after the causes, which gave Fise to them 

 and which we ha<?c just enumerated, have ceased to exist, and al- 

 though the Method of tire et aire has long since been abandoned. 

 The organisation of tlie forests treated by that method is thus a 

 singularly complicated and difficult taslc and is for that Very reason 

 all the more an urgent onfe; 



SECTION II. 



Organisation <df Irregular High Forests 

 OF THE Broad-leaved Species. 



"When, after having formed the Compartments and the Work- 

 ing Circles and deterrriined the length of the Rotation, the Am^na- 

 giste sets himself to draw up the General Working Schem'e, he 

 nearly always finds himself confronted with difficulties of no ttifling 

 nature. These difficulties are, a:s a rule, due to the defective con- 

 stitution of certain crops, the irregular distribution of the various 

 ao-e-classes, and the unequal repartition of the crops corresponding 

 id the principal age-classeS. The formation of the Blocks thus be- 

 comes a very delicate operation. In the same manner as in regular 

 Iiiofh forests, every endeavour should be made to form them in 

 accordance with the general pfinciples already laid down, that is to 

 say, they should be equal in extent or be of equivalent productive 

 f)0wer, and be all in one piece as far as that is possible. Besides 

 this, each Block should comprise a convenient group of compart- 

 ments, in- other otlier words, the whole or at least the greater por- 

 tion of it slrould be composed of crops that will become exploitable 

 during the Period assigned for its reigeneration. 



e 



"With respect to single compartments surrounded on all sides by 

 others of entirely dissimilar character, and which their age, state of 

 growth, composition or density prevent from being regenerated at 

 the same time as the general mass of the Block in which they are 

 situated, they must be considered apart from the rest of that 

 Block. The Special Scheme of Exploitations should prescribe, at 



11 



