82 
BULLETIN 711, U. S. DEPAKTMENT OF AGRICULTURE. 
other than oil, 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 foregoing 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. What 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 boxes. — 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. 82) at a cost of 
about $250. 
Logging -engine water tanks. — 
As a rule, either wooden or steel 
water tanks are mounted on the 
rear end of each logging- engine 
sled (fig. U). 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 drums. — 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 drums. — 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. 
Fig. 32 — Extended fire-box type of boiler. 
