RELATION OF LIGHT-INTENSITV TO ADVANCK GROWTH. I 55 



growth under varying densities of canopy in the regenerated 

 areas. The results of such investigations would show to what 

 extent the optimum conditions, as evidenced by advance growth, 

 are in accordance with those indicated on regenerated areas. 

 Should the agreement be close, this method of experiment might 

 have a practical value in determining the extent of regeneration 

 fellings. Thus the special knowledge of the optimum conditions 

 for the natural regeneration of any particular species, in any 

 particular locality, might be more economically and definitely 

 ascertained by this method than by the methods at present in 

 use. These conditions, which would be obtained in terms of 

 light-intensity, might ultimately be expressed as a percentage of 

 the growing stock. 



In this connection the case of the Chir pine {Finus longifolta) 

 forests in Northern India m,ay be of some interest. In these 

 forests an accidental over-cutting in a regeneration felling gave 

 much better results than had been previously obtained. Conse- 

 quently the first regeneration fellings are now made heavier than 

 formerly, and as a rough rule up to 60 per cent, of the growing 

 stock may be removed. The Chir pine in its character as a 

 light-demander is very similar to the Scots pine, and the value of 

 obtaining an approximate figure, such as the above, for the latter 

 will be readily appreciated. 



In concluding this note, I desire to thank Herr Forstmeister 

 Hebel, who has given me many valuable suggestions, and every 

 facility for carrying out observations in the forest. 



