70 
BULLETIN Til,- U. S. DEPARTMENT OF AGRICULTURE. 
tail trees or between the second tail tree and the yarder. The placing 
of the trip line several roads distant from that being logged obviates 
Fig. 19. — Trip line head 
block. 
Fig. 20. — Trip line sitl 
block. 
frequent change in its position and also keeps it out of the way of 
the logs as they are hauled in. 
The set-up described above has the main line leading straight from 
the main drum, through the main-line fairleader (fig. 21). across 
Fig. 21. — Main-line fairleader, 
"ig. 22. — Butt chain lead 
block. 
the landing, and out along the road to the timber. Only a -mall 
percentage of the timber can be yarded with the lines leading in this 
wav. Most of the roads will form an angle with an imaginary line 
