48 NO TES ON FORES TR Y. 



laid lengthways along the outer edge of the road, 

 and secured with pegs driven into the ground. On 

 completion of this parapet, the remaining logs are 

 lowered one by one into the slide, and set in motion 

 with the assistance of rollers, when they shoot 

 down like an arrow from a bow. At the close, 

 the parapet logs are taken up one after the other, 

 and shot down in the same manner. 



Such slides are impracticable round sharp 

 points or deep indentations, but it is sometimes 

 possible to meet the latter difficulty by extending 

 the slide sloping up the opposite hill. This stops 

 the logs, which can then be turned round, and set 

 in motion in the required direction. 



Snow-slides require little labour to construct. 

 Timber will travel over these at an angle of only 

 5, and may also be shot over the steepest 

 declivities, covered with a good depth of snow, 

 without danger. They are extensively employed 

 in the Bavarian Alps. 



Water transport. In small rivulets, not more 

 than 20 to 30 ft. wide, in the Black Forest, I have 

 seen rafts of a thousand pine-trees rushing down 

 at the rate of 6 to 10 miles an hour. The rivers 

 are first cleared of the larger rock masses and 

 impediments, and the water stored in reservoirs to 

 admit of a flood being sent down when a raft is 

 ready for despatch. Dams are also constructed 



