17-4 BULLEdllSr 111, U. S. . DEPABTMEN.T OF AGIIICULTURE. 



from 12 to 15 gallons of gasoline at a cost of 17 or 18 cents per 

 gallon delivered at the engine. From 10 to 15 gallons of water are 

 consumed per day. 



This type of engine is also used at one camp for yarding timber 

 suitable for piling, and boom sticks from areas that have been 

 logged once. Yarding is successfully done at a distance of from 

 1,000 to 1,500 feet. Three boom sticks, with 22-inch tops and 80 feet 

 in length, can readily be handled at a trip. It is especially adapted 

 for clearing rights of way and stump land, also pile-driver work. 

 It was primarily designed for clearing stump land, for which pur- 

 pose about 50 are in use. Engines of a smaller horsepower can be 

 secured. 



WIRE ROPE. 



The cost of wire rope per thousand feet of loading output i^ dealt 

 with in a general way under " Ground yarding." Ordinarily, the 

 amount is small. With the single gin-pole loading method, the 

 cost of the main loading and spotting lines per thousand feet is about 

 $0.01. In the case of an overhead loading method, where no stand- 

 ing line is used, the cost of" the main and trip loading lines and the 

 spotting line per thousand feet is about $0.03. Wliere a standing 

 line loading method is used, the cost of the loading and spotting 

 lines per thousand feet ranges from $0.03 to $0.06, depending on 

 the distance between the spar trees. 



BLOCKS, HOOKS, TONGS, CARRIAGES. AND OTHER MISCELLANEOUS LOADING 



EQUIPMENT. 



The maintenance and replacement cost of blocks, hooks, tongs, 

 carriages, and other miscellaneous equipment per thousand feet de- 

 pends on the loading method used. It ranges from $0,01 to $0.03. 



The cost of fuel for logging engines is discussed in a general way 

 under " Ground yarding." A loading engine burns between six and 

 seven hundred feet of wood, or about four barrels of fuel oil per day. 



LUBRICANTS. 



The cost of lubricants used in loading is about $0,006 per thousand 

 feet of outimt. 



MAINTENANCE. 



The maintenance of a loading engine costs about $150 per year, 

 this amount being about equally divided between labor and new 

 parts, material, etc. 



