448 DISPOSAL AND SALE OF WOOD. 



imply the sale of the fall of timber on a felling-area for one 

 year, either by single trees, or by a part or the whole felling- 

 area ; or of the principal yield of a forest for a term of 

 years. Where the fall of timber during a single year is sold, 

 two methods are in force, according as the felling and 

 conversion is done by the owner, or by the purchaser. 



i. Sale Inj Unit of Product*. 



Sale by Unit of Produce implies either that the felling, 

 conversion and clearance of the felling-area is done by the 

 forest-owner, or by the purchaser (as in France) ; in the first 

 case it closely resembles sale by detail, differing from it only 

 in the fact that the prices are fixed for each wood-assortment 

 before the trees are felled, also that the purchaser contracts to 

 pay at rates previously agreed upon for all the wood of the 

 assortments he has bought. 



Such sales are at present frequent in Germany, Austria- 

 Hungary, Switzerland, France, etc. They extend usually to 

 the produce of a whole felling-area, and the fellings may be 

 of any character, as neither silvicultural interests nor the 

 revenues of the forest are prejudiced by the mode of conver- 

 sion. As the prices are fixed separately for each wood-assort- 

 ment, and for different classes of assortments by the unit of 

 cubic contents (cubic meter) , an approximately correct estimate 

 of the real value of the yield is secured. When experience of 

 the results of former fellings does not guide the owner (by 

 taking percentages) as to the volume and quality of the crop, 

 the probable produce from each tree should be calculated 

 separately, and an estimate thus made of the volume and 

 quality of the yield of the whole felling-area. It is, however, 

 evident that no guarantee should be given to the purchaser of 

 the exactness of this estimate. 



Where this mode of sale is applied to single trees (as, for 

 instance, large oak-trees) and not to entire felling-areas, a 

 better forecast of the real value may be obtained. 



[In France, where the conversion is done by the purchaser, 

 all the wood cut and converted is measured by the manager or 

 his forester before it leaves the area. Tr.J 



