FOREST-TRAMWAYS. 



349 



and are accompanied by drivers and other men, especially when 

 several trucks are united so as to form little trains (fig. 186). 

 Breaks are always required. 



At present, on the main lines locomotives are used almost 

 everywhere, unless the lines are very short. The locomotives are 

 small, and in mountainous forests specially constructed light, 

 mountain-locomotives with 3 axles are used, which can even 

 travel on curves with a radius of 25 meters (80 feet). In this 



Fig. 19J. 



case the breaks must be very effective. In case the main line 

 is of the ordinary railway-gauge, the ordinary kinds of trucks are 

 used in trains of different lengths, as in the forest of Ebersberg, 

 where 190 truck-loads leave the forest daily, the total annual 

 yield of the forest in timber being 45,500 truck-loads. 



The loading of the trucks is effected by rolling or sliding over 

 inclined poles as shewn in fig. 187. Special machines for loading 



