THE USE BOOK. 101 



violated. Modifications may be approved in writing only by 

 the officer approving the original contract, or by his successor 

 or representative. So far as practicable, all branches of the 

 logging operations must keep pace with one another. The 

 handling of brush should never be allowed to fall behind the 

 cutting and removal of timber, except when delay is allowed by 

 the contract or by a supplemental agreement. 



The best way to dispose of brush is not everywhere the same. 

 It may often be found advisable to lop and scatter the tops to 

 prevent erosion or to favor reproduction. Burning is necessary 

 wherever there is danger of tire. 



Frequently the most economical way to dispose of brush is 

 to burn it as the culling progresses, if weather conditions make 

 it safe. Fires are started at convenient points, and as the brush 

 is lopped off it is thrown on the nearest lire. When this is im- 

 practicable, all lops and debris, including large chips, made in 

 hewing ties, should be piled at a safe distance from standing 

 trees. The piles should be large and compact enough to kindle 

 easily and burn cleanly. Do not allow brush to be piled on 

 stumps, large tops, or unmerchantable logs. Do not allow piles 

 to be made in groups of seedlings or young growth. Whenever 

 possible, have the piles placed in openings, adjusting the size of 

 the piles to the size of the openings. 



SCALING. 



All timber must be scaled, counted T or mepsnrprl by a ForesF 

 officer before it is j^njoyi^L from the cutting area or from the* 

 places agreedjm for the scaling, counting, or measuring. Rough' 

 averagnig^of diameters or Jengths instead of scaling is not 

 allowed. Log lengths should be accurately measured at fre- 

 quent intervals to be sure that they do not overrun the extra 

 inches allowed for trimming. In large sales, a record of the 

 scale of each log must be kept on file in the office of the super- 

 visor. It will be open to inspection by the purchaser at all 

 times, but only in the presence of the supervisor or an inspector. 



