THE LIBRARY. 93 



but a much more efficient method of exploitation, which 

 is being adopted everywhere on the Continent of Europe. 

 It has been introduced with most satisfactory results into 

 the management of forests in India ; and the adoption of 

 it seems to be the only means available to prevent the 

 ruin of forests in our colonies, which are now being 

 rapidly destroyed. 



In this also the forest is divided into a number of 

 sections corresponding to the time required for the repro- 

 duction of the trees. But instead of exploitation being 

 confined to one of these at a time, the supply of wood 

 required is obtained from the felling of the trees in one or 

 more lots, and from first, second, and third thinnings in 

 others all being so arranged as to secure simultaneously, 

 and without prejudice to one or other of them, an improved 

 condition of the forest, a sustained supply of products, and 

 a natural reproduction of the felled forests by self-sown 

 seed. And all these results are now being obtained by this 

 method of exploitation. This may seem to be the ne plus 

 ultra of forest management. But in its application to any 

 forest the arrangement of details must be based on the 

 knowledge of a number of a great number of facts in 

 regard to that forest, and an ordenacion or arrangement of 

 sections and divisions of the forest founded on these. 



There was published in 1847 a resume of a treatise on 

 forest taxation by M. IS oirot-Bonnet, which had been pub- 

 lished in France. It is a brochure of 129 pages quarto, entited 

 Manual de la Tasacion de montes y bosquet, por Don Jose Maria 

 Aniagua. It comprises eight chapters, under which respect- 

 ively the author treats of : 1. The taxation of woods, with 

 different tables for use in the valuation of them under 

 different aspects. 2. Tables of cubic measurement. 3. 

 The increase in cubic measurement of trees. 4. The 

 taxation of different species, with regard to various systems 

 of exploitations. 5. Of the general possible production 

 relatively to area and volume. 6. The comparative 

 quantity of material products. 7. The pecuniary return 

 obtainable by these. 8. The produce, brought under 

 exploitation by thinnings and successive fellings. 



