152 MODERN FOREST ECONOMY. 



period of indefinite, infinite, or perpetual duration every 

 year, every four years, every ten years, according as the 

 case determined may be giving an equal produce either 

 in quantity or in value, according as the case determined 

 shall be equal to the <naximum capability of the forest 

 without diminution, periodical or permanent and 

 without detriment to the forest nor only this, but this 

 without diminution of the forest trees as felled being 

 replaced by natural reproduction from self-sown seed, while 

 the reproduction of the forest and the felling of every tree 

 that is felled tends alike to the improvement of the forest 

 so that it shall ever be rising in value as its products 

 are withdrawn. 



This is what is meant by sustained production, natural 

 regeneration, and progressive amelioration of forests. It 

 may be said, incredulously If forest science, properly 

 applied, can do all this, it can work wonders: it takes 

 away one's breath to read it ! Well, such is the end of 

 forest economy as carried out in Germany and in France, 

 and it is there being accomplished ; nor there alone, but in 

 various other lands ; and it is that apparent perfection of 

 forest management to which students of forest science 

 throughout the Continent of Europe are seeking to bring 

 the ikanagement of forests in the lands with which they 

 are severally connected. 



In the management of forests in the British dominions 

 in India this system of exploitation is being introduced as 

 fast and as extensively as money can produce the men 

 necessary for the work, and as circumstances admit of free 

 action ; and I know of no physical hindrance to the same 

 thing being done in any of our colonies. 



I have spoken of it as having arisen out of the adoption 

 in Germany and in France of exploitation in accordance 

 with the method known as a tire et aire ; but it is now so 

 different from this that it requires separate notice, and 

 this the more that it is the method of exploitation now 

 everywhere in Continental Europe approved by students 

 of forest science. Details will be given ; but it is expe- 



