42 THE THEORY AND PRACTICE OF WORKING PLANS 



group of logging units. Its segregation requires a complete 

 knowledge of such matters as present market conditions, lines 

 of transportation, outlets for the timber, and the probable 

 changes and developments in all three. 



How far. if at all, the blocks should coincide with the admin- 

 istrative divisions, such as ranger districts, must depend on local 

 conditions. It is often convenient to have block and ranger 

 district coincide, and in level country, such as the Prussian 

 pineries, this is entirely feasible. But the purposes of admin- 

 istrative di\ision are so diflterent from those of the working plan 

 that the coincidence should never be secured at a sacrifice of 

 either forest administration or forest organization. • 



The boundaries of blocks and subcompartments need not 

 be marked on the. ground. Compartments must be marked 

 on the ground by blazed lines, durable monuments, posting, 

 roads, trails, streams or other well-defined natural features. 

 A convenient way is stencilling the number of the compartment 

 in white paint on the bark of a tree nearest to the corner thereof. 

 Where the Hnes are not actually cut through, their intersections 

 with roads, trails, streams, etc., should be similarly designated. 

 WTiere road or trail or stream itself serves as the boundary, 

 this is not necessary, but merely corner monuments or occasional 

 guide-monuments are placed. 



On the map the boundary of the working unit is marked 

 by hea\y dot and dash — . — . — . — ; the blocks by dashes 



; the compartments by a dotted line 



; and the subcompartments by a thin 



unbroken line . 



References. — Roth, " Forest Regulation," pp. 34-43, Illick, " The Subdivision 

 of Forests," F. Q., Vol. XIII, No. 2, pp. 183-198. 



IMaps AND Tables 



The various data collected in the field should, as far as 

 possible, be entered on maps and summarized in tables. In 

 this way they are made available at a glance. 



Maps, or, at least, some map of the forest, however crude. 



