940 JOURNAIv OF FORESTRY 



and in most cases less. In spite of the relatively small estimated error, 

 the results, as regards the growing stock, its distribution in diameter- 

 classes and species, its increment, etc., were quite accurate, the average 

 error not exceeding 1.5 per cent, which must be considered a very close 

 result. 



It is proposed to make the survey for the whole country in the same 

 manner in the next six or ten years, the cost being estimated at only 

 $160,000 or $170,000. 



Die Schatcung des Holzvorrates hi den Wdldern des Ldns Vdrmland. Reprint 

 from Internationalen Agrarokonomischen Rundschau, October, 1915, pp. 119- 123. 



An interesting note of the results of proper 



Yield management of one of the city forests of Chur, 



under in Switzerland, is derived from a working-plan 



Management revision, such revision being made every 10 years. 



The city forest of Coire has an extent of around 



somewhat over 3,000 acres. For the period 1855-1864 the felling 



budget was 950,000 cubic feet ; for the period 1907-1916 it had nearly 



trebled, to 2,470,00 cubic feet, and a further increase is foreshadowed. 



To prove that -this increase in cut is warranted, the stock on hand by 



size classes is given in per cents for 1906 and 1917; the cubic contents, 



with diameters from 6 to 20 inches and over, ran in 1906 as 5. 20, 28, 



24, and 23 per cent ; in 1917 the diameter classes contained 3.9, 18.2, 



27.5, 24.8, and 25,6, showing that the larger sizes participate in the 



stand at the last date with larger per cents, and the total volume of 



stand is also slightly larger. It is also of interest to follow the growth 



of financial results from decade to decade, beginning with 1855- 1866. 



which, to lie sure, are also influenced by change of prices (figures 



rounded ofY) : 



Decade 



I II III IV V VI 



Net return per acre $1.40 $2.40 $3.15 $3-90 $440 $6.00 



Expense per cubic foot cut, 



cents 034 .08 .064 .08 .084 .13 



In about 60 years the net income had increased nearly fivefold, and 

 since the Zurich forests are now yielding as much as $12 per acre, fur- 

 ther increases may be expected. 



Journal Forestier Suisse, September-October, 1918, pp. 175-176. 



