LUMBERING IN" PINE REGION OF CALIFORNIA. 27 



Table 5. — Approximate cost of best grade of logging blocks. 



Kind of block. 



Size of sheave. 



Weight. 



Cost. 



Trip line 



Tailbloct 



Do 



Yarding block 



Do 



Do 



Tommy Moore 



Do'. 



Moving block 



Roading and yarding spool 



lObvl.. 



15 by li. 

 19 by 11. 

 8 by 2... 

 10by2i. 

 12 by 2*. 

 14by S:. 



16 by 8.. 

 18 by 21. 

 14 by 8!. 



Innhes. 



Pounds. 

 52 

 132 



230 

 210 



$15 

 25 

 35 

 21 

 25 

 30 

 50 

 60 

 50 

 45 



In addition to blocks, so-called "fair-leaders" are placed on the 

 front of tlie sleds of narrow drum yarders, for the main line and some- 

 times for the back line. The cost ranges from S50 to $100 each, 

 depending upon size. 



Operation. — Yarding begins with the moving of the machine to its 

 setting, which may be either on a railroad spur, a chute, or a roading 

 trail. After the machine is set, the back or trip line is hauled out by 

 a horse around several runs, passed through the tailblock and returned 

 to the donkey along the line of the first run. The outer end of the 

 main line is then attached to the back line by means of a clevis. A 

 short piece of cable terminating in the heavy butt hook is fastened 

 to the end of the main line for the purpose of attaching chokers. 

 Since the donkey is usually set parallel to the track or chute, a 

 Tommy Moore is ordinarily placed at a distance of from 200 to 250 

 feet from the donkey, for a main lead block. Its purpose is to steer 

 the logs into a bucking chute, or to bring them in parallel to the track 

 for loading, and to give the cable the right lead for spooling on the 

 drums. A second Tommy Moore may also be used farther out in 

 the woods when it is necessary to avoid obstacles or change the 

 direction of the lead. The trip line blocks are placed at intervals on 

 the back hne to hold it up from logs and rocks. 



When the cable has been strung and everything is in readiness for 

 logging, the back line is reeled up on the return drum and the main 

 lino hauled out to the first log. A choker has previously been 

 hooked around one end of the log. The free end of the choker is 

 attached to the butt hook and the main line is reeled in, bringing the 

 log with it. Tlie log must ho stopped at the lead block, slack pulled 

 in the main line; by tlie back line, and the choker unhooked and 

 pjussed around the block. At the landing the choker is unhooked 

 and tli(! line returned to the woods for another log. 



Each round trip is (h'signated as a turn. The common trail made 

 by the logs taken in from one location of the tail block is called a 

 run. Wlicn a run is completed the tail block and back lirn^ must ])e 

 shifted to Ihc next nni. One, two, or three logs may be brought in 



