LOGGING IN THE DOUGLAS FIR EEGION. Ill 



(5) Logging engine, 11 by 13 inch; boiler, 66 by 120 inch, 200- 

 pound working pressure, safety valve set at 175 pounds; time, 5 

 months ; average daily consumption, 7.8 barrels ; chance, ground was 

 extremely rough, requiring at times the use of two lead blocks and 

 a stump roller; average log, 1,870 feet; maximum yarding distance, 

 1,500 feet; average yarding distance, 750 feet; average output per 

 engine per yarding day, 59,400 feet. Cost of fuel oil per barrel 

 delivered in tank on rear end of sled, $1.05, or $0,138 per thousand 

 feet. It is estimated that had wood been used the fuel cost would 

 have amounted to $0,305 per thousand feet, so that $0,167 per thou- 

 sand feet was saved by burning oil. 



(c) Logging engine, 11 by 13 inch; boiler, 66 by 120 inch, 200- 

 pound working pressure, safety valve set at 185 pounds; time, 29| 

 days; average daily consumption, 8.9 barrels; chance, up-hill yard- 

 ing, the maximum lift amounting to 325 feet ; maximum yarding dis- 

 tance, 1,200 feet ; average j^arding distance, 609 feet ; average output, 

 98,700 feet. Cost of oil per barrel delivered in tank on rear end of 

 sled, $1.05 per barrel, or $0,089 per thousand feet. It is estimated 

 that had wood been used not more than 75,000 feet per day could 

 have been yarded and the fuel cost would have amounted to $0,184 

 per thousand feet, so that $0,095 per thousand feet was saved by 

 burning oil. 



Those who have used coal in their logging engines feel that it has 

 a decided advantage over wood. It does not, however, decrease the 

 fire risk, neither is it a cheaper fuel than oil; so oil is preferred to 

 coal, except in special cases where coal can be bought very cheaply. 



The cost statements of operators do not show the cost of fuel con- 

 sumed in logging engines as a separate item, and where wood is used 

 the value of the merchantable timber consumed in this way is not 

 charged against the cost of the logging. Since purchasers of national 

 forest timber pay the same prices for merchantable timber consumed 

 as fuel as for timber removed from the sale area, it is obvious that 

 the cost of such material should be provided for in timber appraisals. 

 Of course, if the character of the timber is such that it is clear that 

 ample and satisfactory fuel can be secured from cull logs, the ap- 

 praising officer will not make any allowance in his estimate. While 

 it costs as much, or more, to deliver a wood log as a merchantable log 

 alongside the logging engine, it may not be practicable for an ap- 

 praising officer to take care of this cost under the heading " Fuel cost," 

 since it can more easily be provided for in the estimated yarding 

 output. The labor cost of preparing the wood for fuel can also be 

 more easily taken care of under the heading " Yarding cost, labor." 



The amount of sound wood consumed in a yarding engine ranges 

 from 1,000 to 1,500 feet per day, depending for the most part on the 



