2 Introductory 



into great logs and are dragged through the forest by 

 teams of horses until they reach the steep banks of 

 a river. The logs are then let go, and slide down into 

 the river with a mighty splash. Hundreds of these 



Fig I. A Log Chute, Canada. 



logs, jostling each other over the rapids, are carried 

 down by the river. Sometimes they get jammed 

 together and can go no further until men, taking their 

 lives in their hands, leap from one log to another 

 breaking up the block. When they reach the saw-mill 



