WHEELED VEHICLES 



183 



Another type known as the "slip tongue" cart has a tongue 

 28 or 30 feet long, which slides between the hounds of the cart. 

 When the cart is in motion the tongue is held in a fixed position 

 by a catch which the driver may release by a trigger when ready 

 to load. There is a roller directly over the axle, to which the 

 grapples are attached by chains. Fastened to this roller is a 

 short lever arm which is connected to the sliding tongue by 

 means of a chain. The cart is driven over a log, the catch hold- 

 ing the slip tongue is loosened, the team backed up and the 



Fig. 47. — A Slip Tongue Cart in a Southern Yellow Pine Forest. Lever 

 arm is elevated so that the grabs can be removed from the logs. Texas. 



tongue slipped to the rear. The roller is so weighted that it 

 revolves in a quarter circle, carrying the lever arm to a nearly 

 vertical position. The grapples are then fastened to the logs 

 and the team is started. The tongue slips forward, pulling the 

 lever arm to a horizontal position, and raises the front end of 

 the log from the ground. When the short lever arm reaches the 

 catch on the tongue it is automatically locked. The team then 

 starts for the skidway with the load. 



High wheels of this character are especially adapted for a flat 

 and rolling country with a firm, smooth bottom and an absence 



