Cost of Logging Large and Small Timber 449 



logs averaging 24 inches. In a rough country this would have 

 considerable bearing on supplying a large mill with logs. 



Loading Time for Logs of Different Sizes 

 Average Diameter Loading Time per 



The cost of piling and loading lumber varies almost directly with 

 the number of pieces of lumber which must be handled per M 

 board feet. The Ivimber from logs 16 inches and over when these 

 costs are about 60 cents per M feet increases to 90 cents for lumber 

 from logs 10 inches and under in diameter. There is, however, a 

 proportional increase in handling extra wide limiber from very 

 large logs and also in handling large sawed timber from large logs, 

 but on the whole there is so small a proportion of lumber of these 

 classes that it can be neglected as a factor in most eastern operations. 



Sawing at Mill 



In keeping the sawing time at the mill the logs have been sepa- 

 rated into the heavier and harder woods such as oak, beech, birch, 

 and maple, and the softer and lighter woods such as pine, chestnut, 

 basswood and poplar; as well as into length classes. The curve 

 (Fig. 3) showing the sawing time for the harder woods does not 

 qmte parallel that for the softer woods, but rises appreciably as the 

 diameter becomes smaller, indicating that a relatively longer time 

 is required for sawing M feet. This is due to the fact that the 

 harder woods of small diameter cut out absolutely less than the 

 corresponding diameters of the softer woods and consequently 

 more logs must be handled per M feet of limiber produced. Nearly 

 all of the softer woods have smooth, round and straight logs even 

 when they are of very small sized trees whereas the small sized logs 



