60 FOREST STATISTICAL DATA 



grazing betterments. Much the same thing is true in the United States, 

 where the Forest Service has a lump-sum appropriation to cover all man- 

 ner of scientific work and investigations as well as for the management 

 and protection of the National Forests. Huffel^ makes the conclusion: 



"Taking everj'thing into consideration, it is estimated that $173,700 is about the 

 expense for the management of the State forests; this figure corresponds to 6 cents per 

 acre. It is estimated that protection costs 16 cents per productive acre; maintenance 

 absorbs 12 cents per acre; communal and departmental tax 16 cents per acre. We have 

 then the following revenues and costs per productive acre in State forests for 1892 

 (which is considered a typical year) : 



Per cent of 

 gross revenue 



$2.26 Net yield, or 81.2 



.06 Cost of management, or 2.5 



.16 Cost of protection, or 5.8 



.12 Maintenance, or 4.5 



.16 Communal and departmental tax, or 5.9 



$2.76 Gross revenue 99.9 



"The expense for the personnel in France represents only 23 cents per productive 

 acre, or 8.3 per cent of the gross revenue." 



It is of interest to note that this cost figure is less than those for Ba- 

 varia, Prussia, Saxony, or Wiirtemberg where the lowest (Wiirtemberg) 

 absorbs 12.1 per cent of the gross revenue for personnel. 



Statistics of Fir Stands in the Jura. — One of the questions asked by- 

 private forest owners and others interested in the yield of forests is : What 

 will forests (naturally regenerated) return in lumber or money? The 

 answers given to this question by normal yield tables, usually based on 

 planted stands, are often so high that they cannot be apphed, without 

 much guesswork and modification, to American conditions. Actual 

 averages of compartments or whole forests are more rehable for the pur- 

 poses of judging what forestry can attain. (See also Chapter XI.) 

 Therefore the statistics ^ which follow, for fir-spruce forests in the Jura 

 mountains of France, somewhat comparable to spruce-fir stands of 

 northern New England, are of particular interest and value. They show 

 what forestry can attain (as a maximum) under favorable conditions on 

 non-agricultural mountain land over whole compartments of 15 to 30 

 acres. 



(a) Compartment 18, fifth working group, State Forest of La Joux 

 (second Jura Plateau), 60 per cent fir and 40 per cent spruce, fully stocked, 

 thrifty stand planted after a windfall in 1812; 100 years old in 1912. 



* Pp. 408-409, Vol. I, ficonomie Forestiere. 



^ Based on unpublished data supplied by Devarennes, Inspector, French Forest 

 Service, in charge of Jura workmg plans in 1912. 



