I'SS JOURNAI. OF FORESTRY 



is largely a planting plan. The whole plan is for only ten years, after 

 which a more elaborate one may be prepared. The stands are largely 

 immature and present chiefly problems in improvement cuttings rather 

 than in harvests. The author's statement that the Von Mantel 

 formula is the only one of the eighteen methods mentioned in "Theory 

 and Practice of Working Plans" which is practicable for the condi- 

 tions, is not supported by reasons. 



While the author determines the annual and the next ten-year 

 periodic felling budget, using Von Mantel's formula, this operation 

 seems at first thought rather pedantic, as the author of the plan does 

 not propose to cut the indicated amount, since "because of the small 

 size of the softwood timber, it would be inadvisable to remove all of 

 this (budget) and it should be allowed to accumulate." The following 

 rules set down by the author of the plan were perhaps sufficient during 

 the next ten years without the budget formula : 



(1) Dead, dying, and diseased trees are to be removed first; also 

 windfalls. 



(2) Cutting should be such as to benefit the remaining stand. 



(3) Trees of poor form and undesirable species should be removed. 

 Along the ravines and along roads and trails, the marking should be 

 light. 



However, the application of the formula might serve as a check in 

 the volume to be cut and therefore be worth calculating, especially as 

 practically no labor is involved other than that already employed in 

 taking stock. W. J. M. 



The Regeneration of Sal (Shorca robusta) Forests: A Study in 

 Economic Ecology. By R. S. Hole, Indian Forest Records, Vol. 

 Vni, Part n, 1921. 



For many years foresters in India have given much attention to 

 problens centering around the regeneration of Sal (Shorca robusta), 

 a species of much economic importance. Until recent years, however, 

 no systematic and consecutive research has been applied to these prob- 

 lems. As it is at present, the regeneration of Sal forests is very slow 

 and uncertain. Twelve years ago the Research Institute at Dehra Dun 

 began a comprehensive ecological study of the factors influencing the 

 development of Sal seedlings in order to discover a practical method 

 for speeding up the period of regeneration and rendering it more cer- 



