LOGGING IN THE DOUGLAS FIE REGION. 163 
the cars from the point of delivery of the yarding engine. In many 
cases the loading engine is mounted on the same sled or car as the 
yarding engine, the combination machine being set as close to the 
head spar tree as possible. 
When the yarding output is large, this method is not entirely 
satisfactory, since the logs can not be loaded with it as fast as they 
are yarded. In an attempt to remedy this condition and still use 
practically the same method, some operators are using two loading 
lines instead of one (fig. 34). The two lines lead from the loading 
engine and pass through blocks suspended on guys immediately over 
the car to be loaded, in the same manner as in the case of the single 
loading line method. One loading engine designed especially for this 
method consists primarily of two independent loading engines 
mounted on a common frame. The drums are fixed to the shaft and 
can be operated in the same direction or opposite directions at the 
same time, being controlled by two throttle levers. The cylinders are 
9^ by 10 inches. The loading engine is mounted on a 125.000-pound 
capacity car, immediately in front of the yarding engine. The yard- 
ing and loading engines and car form a complete yarding and loading 
unit, somewhat similar to the tree-rigged Lidgerwood overhead 
skidder. It is not necessary, of course, to mount the loading and 
yarding engines on a car. Certain advantages, however, result from 
this arrangement, such as the saving of time when moving, and the 
elimination of a loading fireman, the loading engine taking its steam 
from the same boiler as the yarding engine. When operators are 
properly equipped to get the most out of this equipment, the loading 
and yarding engines are mounted on a steel car with swivel trucks, 
the swivel trucks making it possible to set the car to one side of the 
track without constructing a siding. 
The fixed investment in equipment with this method at one side, 
where two loading lines are used, amounts to about $1,120. as fol- 
lows : 
1 9| by 10 inch Duplex loading engine $3,000 
2 loading jacks 120 
2 loading guys , : 225 
5 blocks 110 
2 loading lines 120 
1 spotting line 45 
Loading engine repair parts and materials 1 75 
Loading engine sled 250 
Oil burner equipment, including oil and water tank 375 
Miscellaneous equipment 100 
Total _ 4.420 
Note. — The statement includes operating equipment as well as equipment on hand. 
Duplex loading engines without boiler cost from $2,200 to $2,400. A steel car costs about 
$2,000 ; with air brakes, $2,200. 
