240 
LOGGING 
car and hauled by rail to the new set-up. Some loggers now 
mount their machines on cars instead of sleds. 
The yarder is set up at one end of a landing along a logging 
railroad or at some intermediate point between the stump and 
the railroad if a" swing" machine is to be used at the landing. 
From Bui. 711, U. S. Dept. of Agriculture. 
Fig. 76. — A Logging Chance showing the Location of the Ground Yarding 
Roads, Pacific Coast Forests. 
The area logged from one set-up is determined chiefly by topogra- 
phy and stand of timber per acre. It is often irregular in shape, 
due to topography, being delimited by ridges, gullies, or the 
practical yarding range. The latter may be as short as 500 
feet when conditions for railroad construction are very favorable. 
As a rule, the average distance is from 600 to 900 feet but in some 
cases logs are skidded for distances as great as 1500 feet/ 
