FLOATING AND RAFTING 



363 



and are fixed in a permanent position by means of a brace 

 extending from the fin to the main boom. 



The boom may be thrown across a stream at any angle less 

 than 90 degrees by winding in on the cable and increasing the 

 angle between the boom and rudders. The boom may be brought 

 to shore by letting out cable. 



A barge boom consists of a limber boom, three or four logs 

 wide, the upper end of which is fastened to a barge anchored in 

 midstream and the downstream end to a tree on shore. A boom 

 of this character is serviceable in a navigable stream where per- 

 manent booms cannot be used, and where the stream bed can- 

 not be obstructed with piling or cribs. It is often used in 

 connection with a fin boom when it is desired to shunt logs to 

 one side of a wide stream. 



STORAGE AND SORTING FACILITIES 



On all large streams on which logs are transported, the prop- 

 erties of various companies become intermingled, and at destina- 



FiG. 108. — Piers built in a River to hold Storage Booms in I'l; 



tion it is necessary to sort out the timber of each owner. For 

 this purpose sorting works are maintained at points where any 

 given logs are to be manufactured, and extensive log storage 



