LOGGING IN THE DOUGLAS FIR REGION. 



69 



Then, as soon as the last log is on the old road, the chaser unhooks 

 the trip line from the main line and sends it back. When it reaches 

 the new tail tree the hook tender is there to attach it to the straw line 

 and send it in over the new road to the yarcler, where it is attached 

 to the main line. By the time the crew has moved up to the front 

 of the new road the butt chain has arrived, thus enabling them to 

 start hauling logs again with practically no loss of time. 



Until quite recently the trip line was run out and changed from 

 one road to another by hand, and in some camps this method is still 



Fig. 18, 



chance showing location of ground yarding roads. 



used because of the character of the yarding engines. All operators 

 that have used a straw line, which should consist of f -inch plow-steel 

 cable, are convinced that it is a valuable piece of equipment, espe- 

 cially in rough, steep ground. It has been estimated that it increases 

 the yarding output from 10 to 15 per cent. 



In addition to the two head trip blocks (fig. 19), which are hung 

 to the tail trees by means of straps made from short pieces of cable, 

 it may be necessary to reduce wear and tear on the trip line, to use 

 two or three other trip-line side blocks (fig. 20), either between the 



