236 LOGGLNG 
cable and the other end is reeled in on the small drmn. This 
drags the messenger cable out over the road, through the sheave 
block and back to the skidder. The small cable is then detached 
and the end of the main cable fastened to the messenger. The 
pullboat is now ready for operation. When one road has been 
pulled, it is customary to change only the main cable, leaving 
the messenger in the first run logged until the distance between 
the sheave blocks becomes several hundred feet. It then does 
not get in the way of logs coming down the main road, is less 
subject to damage, and less time is required in changing runs. 
In changing from one run to another, the sheave block is left at 
the head of the first road and another is placed at the head of 
the next road to be pulled. The |-inch cable is carried from the 
pullboat out over the new road, through the sheave block and 
then across to the first run where the main cable is detached from 
the messenger cable, and the latter connected to the f-inch line. 
The main cable is drawn to the machine and, by reeling in the 
small cable, the messenger cable is pulled over into the new run 
and along it to the pullboat. The messenger and main cables 
are again coupled together and the equipment is ready to log the 
new run. A piece of telephone wire fastened to the whistle on 
the pullboat is strung along the outer edge of the run and signals 
are given to the engineer by pulling on the wire. The sheave 
blocks are usually placed by a special crew before the change is 
made and the |-inch cable is run out by this crew unless the 
distance is long, when the entire pullboat crew is required. Ten 
or twelve men can string out 2600 feet of f-inch cable in about 
three hours. 
The logs are prepared for skidding by the insertion of plugs 
or "puppies" in the holes previously bored by the sniping crew. 
Cylindrical plugs 2 inches in diameter and 12 inches long are 
connected in pairs by two sections of ^-inch chain 24 inches long 
fastened to a 6-inch ring. The plugs are driven into the log and 
the ring on the plugs is fastened by a short chain to the main 
cable. The log is now ready to be hauled out to the main road. 
This requires some maneuvering if there are stumps, logs or 
trees in the line of the log being hauled. When once the log is 
dragged into the main run, it is left there until a tow of four logs 
is secured. Each log is fastened by a short chain or enable to 
one of the rings on the outer end of the main cable. The boss 
