CHAPTER XVI 
TIMBER SLIDES AND CHUTES ^ 
Slides are channels used chiefly for transporting logs, although 
pulpwood, crossties, firewood, and acid-wood, may also be handled 
in this manner. There are two general types; namely, earth 
Fig. 84. — A Two-pole Running Log Slide. Idaho. 
slides and timber slides, both of which may be combined to form a 
single slide. 
They are in frequent use in Pennsylvania, the Appalachian 
1 The theory of sUde design is treated exhaustively in Beitrag zur Kenntnis 
der dynamischen Vorgange beim Abriesen des Holzes in Holzriesen, by Dr. 
F. Angerholzer v. Almburg, Centralblatt fiir das gesamte Forstwesen, April, 
1911. 
262 
