202 THE THEORY AND PRACTICE OF WORKING PLANS 



(/> = - X loo, where c = the actual annual cut and v = the actual 



growing stock.) 



In the selection forest the current annual increment furnishes 

 the principal index for the allowed cut, as well as other con- 

 siderations, like market and labor conditions, etc. 



A large number of forms for gathering the necessary data 

 accompany this instruction; the control book is to furnish 

 a complete chronicle by stands. Besides the sample areas 

 mentioned, so-called special typical " index stands " are to be 

 used to accumulate data of yield and finance, and these are to 

 be specially booked. 



The map work is also to be improved by stand maps showing 

 species, age class, site. 



The working plans are to be made by a special bureau, as 

 hitherto, except that the head of the bureau is now made a mem- 

 ber of the central direction. 



Statistical Record has, since 1869, been in intimate conjunc- 

 tion with forest organization so as to have systematic data on 

 conditions and results, to simplify the working-plan documents 

 and to be applied as precedents, good or bad. 



The vital statistical records are: The history of the particu- 

 lar administrative unit (origin, composition, status, etc.); the 

 description of the forest according to the subheads: forested 

 area, topography, management, forest utilization, logging 

 methods, forest protection, the chase, money returns, etc. 



These data are compiled for the first time by the adminis- 

 trative officers of a forest, but the continuation and supple- 

 menting thereof is done by the forest organizer at revision of the 

 working plan. 



VI. Alsace-Lorraine 



These provinces, conquered from the French in 1870-71, 

 contain the major part of the Vosges Mountains, a long line of 

 low ranges flanking the Rhine on the west. Together they have 

 an area of 3,584,711 acres, of which 1,086,385 acres, or 30.31 

 per cent, are forested. 



