472 APPENDIX 
able, the cable and swamp hook are moved forward to another stump. 
(P. C. F.) See Block hold. 
Block hold. An arrangement of cables and blocks to secure added power for 
moving logs. The free end of the main cable is passed through a block 
attached to the log to be moved, and then fastened to some stationary ob- 
ject. Power is then appHed to the opposite end of the cable. Two blocks 
and three blocks respectively are attached to the object to be moved. 
(P. C. F.) .See Block-and-wliip. 
Syn.: one-block hold. 
Block tender. See Chaser. 
Blow, n. A break in a dam, usually at the base, due to the lack of proper 
toe piling. (N. W.) 
Blow down. See Windfall. 
Blue jay. See Road monkey. 
Bluing, n. The result of fungus attack, which turns the sapwood of certain 
trees blue. (Gen.) 
Board foot. A unit of measure in the lumber trade. It is a section 12 by 
12 inches in size and 1 inch thick, or its equivalent. (Gen.) 
Board up, to. To place a spring board in position. (P. C. F.) 
Bob, n. A single pair of sled runners on which the forward ends of logs are 
loaded. (L. S., N. W.) 
Syn.: sloop. (E. C.) 
Bobber, n. See Deadhead. 
Bob logs, to. To transport logs on a bob or dray. (N. F.) 
Body wood. Cord wood cut from those portions of the stems of trees which 
are clear of branches. (N. F.) 
Bolster, n. See Bunk. 
Bolt, 71. A segment sawed or split from a short log. A term usually applied 
to blocks from which shingles, staves and vehicle stock are manufactured. 
(Gen.) 
Syn.: shingle bolt, stave bolt, spoke bolt. 
Boom, n. Logs or timbers fastened together end to end and used to hold 
floating logs. The term sometimes includes the logs inclosed, as a boom 
of logs. (Gen.) 
Boomage, n. Toll for use of a boom. (Gen.) 
Boom buoy. *See Boom stay. 
Boom chain, A short chain which fastens boom sticks end to end. (Gen.) 
Boom Company. A corporation engaged in handling floating logs, and 
owning booms and booming privileges. (N. F.) 
Boom pin. A wooden plug used to fasten to boom sticks the chain, rope, or 
withe which holds them together. (Gen.) 
Boom rat. One who works on a boom. (N. F.) 
Boom stay. A heavy weight used to anchor booms in deep water; its po- 
sition is indicated by a pole or float attached to it. (N. F.) 
Syn.: boom buoy. 
Boom stick. A timber which forms part of a boom. (Gen.) 
Bottle butted. .See Swell butted. , 
