l62 



LOGGING 



The snub-line consists of a i|-inch or 2 -inch manila rope, one 

 end of which is fastened securely to the load. The other end is 

 given two or three turns around a stump at the head of the grade 

 and gradually paid out as the sled descends, the speed being 

 controlled by means of a brake on the stump. 



A bridle is a chain passed around a runner in front of the bunk. 

 It is put on and removed as circumstances demand. A clevis 

 attached under the forward part of a runner sometimes replaces 

 it. Bridles can only be used on smooth ground, otherwise the 



Fig. 37. 



Yarding-sled Trails leading down to a Skidway on a 

 Two-sled Road. Maine. 



chains catch on roots and other obstructions and stop the sled. 

 Tail chains, which bind together the rear end of the load, also 

 act as impediments and assist in the control of the sleds. Aided 

 by any of these devices, teams with loaded sleds can go down 

 slopes, up which they cannot return with empty sleds. The 

 general scheme of roads is shown in Fig. 37. 



The cost of constructing main yard roads ranges between $60 

 and $100 per mile. 



Two-sled Roads. — The road system for an operation on which 

 the logs are to be transported on two-sleds, comprises a main 



