82 



BULLETIN 711, U, S. DEPARTMENT OF AGEICULTURE. 



Other than uil, in or near forest or brush land, which is not provided with an 

 adequate spark arrester kept in constant use and repair. Any person, firm, or 

 corporation who shall willfully fail to comply with the foreg6ing provisions of 

 this section shall be guilty of a misdemeanor, and upon conviction thereof shall 

 pay a fine for each engine or locomotive without such spark arrester of not 

 less than twenty-five dollars ($25.00) nor more than one hundred dollars 

 ($100.00), and shall be enjoined from further use of such engine or locomo- 

 tive until such spark arrester is provided. Escape of fire from an engine shall 

 be prima facie evidence that such appliance has not been adequately maintained 

 in compliance with this section. Under proof that any prosecution has been 

 instituted under this section by any fire warden, any court of competent juris- 

 diction shall enjoin the further use of the engine involved, unless equipped and 

 maintained in compliance with this section to the satisfaction of said fire warden, 

 until the defendant has been acquitted of the charge preferred. 



There are a number of different 

 types of spark arresters used. The 

 prices vary with the type of ar- 

 rester and the size of the. engine 

 stack. T\Tiat is claimed to be a 

 particularly effective arrester can 

 be purchased for from $125 to 

 $160. Prices in general range 

 from $20 to $160. 



Extended fire hoxes. — Manufac- 

 turers of logging engines are pre- 

 pared to equip all logging engines 

 having cylinders 10 inches or 

 larger in diameter with extended 

 fire boxes (fig. 32) at a cost of 

 about $250. 



Logging -engine loater tanlis. — 

 As a rule, either wooden or steel 

 water tanks are mounted on the 

 rear end of each logging-engine 

 sled (fig. 14). The steel tanks, 

 which fit on a saddle, give the best service and cost from $100 to $200, 

 depending on their capacity. A 5 by 8 foot steel tank costs about 

 $125. This tank is sometimes made in two compartments; one for 

 oil, the other for water. 



Straw drurm. — The drum used to operate the straw line may be 

 located on an extension of the main or trip drum shaft, or on the 

 main drum shaft inside the frame. The cost of equipping an engine 

 with a straw drum amounts to about $150. 



Loading drurm. — When separate engines are not used for loading 

 purposes, it is necessary to have a third friction drum on the yarding 

 engines. On compound-geared yarding engines this drum is located 

 on the main drum shaft, either on the inside or outside of the frame. 



■■^2>iMoDv)ooeo£C£0; 

 Fig. 32 — Extfndod fire-box t.vpe of boiler. 



