218 
LOGGING 
pulls the tongs against the trolley. The line is run out by means 
of a |-inch slack-pulling line which passes from a drum on the 
skidder through a block on the head spar tree, thence around a 
small sheave in the trolley and back in the direction of the head 
Fig. 65. — Cutting the Top from a Head Spar on which is placed the Main 
Cable Rigging for a Cableway Skidder. Cypress Forest, Louisiana. 
spar.^ The free end of the line is attached to a swivel, through 
which the skidding line passes. A button is fastened on the skid- 
ding line ]:)etween the swivel and the carriage block. When 
slack is desired, the slack-pulling line is drawn in, which pulls 
the swivel against the button and draws the skidding line towards 
the trolley and thus lowers the end of the line to the ground. 
The distance of the button from the end of the skidding line may 
be adjusted to give any amount of slack desired. This equipment 
has replaced the five or six men who were required for pulling 
slack in the earlier types. 
1 See Fig. 66. ' 
