once to cither principle) of nar!:in. The mature and decad- 

 ont timber, the ocattered stands, the young groups with a 

 few old trees in mirture make it impossible to use o it her 

 system regardless of the other. 



In the oarly narlrings on the PltoaaD , an idea of 

 prettily distributee, stands was to a great orient aimed at. 

 as the theory of narliing has been worlred out, it lias become*- 

 more evident that the ainou.:it of timber to be removed should 

 be considered regardless almost wholly of any even distri- 

 bution of stand. Sone of the early marliing on the Plumas 

 was justly criticised because of both tho amount of timber 

 that was lef- as a whole and especially in young groups of 

 timber where a few trees could be removed profitably to the 

 operator. !Tow there fev/ trees that were removed did not 

 open up the stand sufficiently to permit of reproduction. 

 Consequently we had left a number of openings net sufficient- 

 ly larco "^o produce reproduction and at the same tine \vere 

 apparently uncalled for bocouso the trees that were removed 

 could have remained to complete the group to accord with 

 the f;roup system which we are now trying to approximate. 

 The present marZiing goes farther in that it attempts to leave 

 the best silvioultural conditions foi reproduction and at 

 the same time do the best possible by tho sawmill operator, 



!7e do not propose to make a: y large, clear cutting 

 in any stand if the trees that occur in it are at all pos- 



230 



