162 BULLETIN "11, U. S. DEPARTMENT OF AGRICULTURE. 
corner block on the other gin pole, and thence? to the louver drum of 
the engine. The lifting line is handled independently of the trip 
lines, making it possible to raise or lower the load while the carriage 
is running on the standing line. 
The fixed investment with this method varies considerably, depend- 
ing for the most part on the distance between the spar trees. It 
would seem that it should never exceed $5,337 at one side, as follows : 
1 four-drum loading engine $2, 700 
2 sets of guy lines 200 
1 standing line 550 
1 14-inch four-sheave carriage 150 
2 trip lines 330 
1 loading line 300 
7 14 by 2 inch blocks 147 
2 tree shoes . 60 
1 spotting line 100 
Loading-engine repair parts and materials 75 
Loading-engine sled 250 
Oil-burner equipment, including oil and water tank 375 
Miscellaneous equipment 100 
Total 5,337 
Where it is desired to load on only one side of the track at a 
setting, only one trip line is used. The scheme is shown in figure 66. 
Under such conditions the fixed investment should not exceed $4,900. 
since the cost of blocks and trip line is less. 
GIT-LINE METHOD. 
The guy-line method of loading is not infrequently employed with 
overhead and high-lead yarding methods, for which it is particularly 
adapted. As a rule, the head spar tree used with these yarding 
methods is guyed with from 6 to 11 lines. 2 of which can be so 
arranged as to permit the attachment of a loading block at a point 
directly over the center of the track and about 60 feet from the 
ground (fig. 62). The loading line, leading from its drum on 
the loading engine, passes through a block on the head spar tree, 
thence through the loading block suspended to one of the loading 
guy lines. In some cases the latter block is attached to a loading 
carriage, which in turn is supported by the loading guy line. A pair 
of tongs is attached to the loading line, the weight of which is suffi- 
cient to prevent the loading line from running back through the 
block. Where the yarding and loading engines are mounted on sep- 
arate sleds the location of the loading engine, as related to the loca- 
tion of the yarding engine, depends on the chance. The yarding and 
loading engines may be placed side by side on the same side of the 
track, as near the foot of the head spar tree as possible*, with the 
loading engine next to the track, the logs being loaded directly to 
