406 
LOGGING 
and separate the logs by marks as they pass under them. The 
gaps are built in many forms depending upon the amount of work 
to be done and the physical conditions which are encountered. 
Fig. 144 shows an assorting gap on the St. John's River near 
Fredericton, New Brunswick. This has two block piers 50 feet 
apart and behind them are rafts built of five logs each, so arranged 
that five gaps, each 22 feet wide, are formed on each side. The 
space between opposite rafts is spanned by 4-foot plank bridges 
on which the assorters stand. The division boom shown extends 
Fig. 145. — A Patent Assorting Works used in the Appalachian Region. 
downstream for 2000 feet to sheer booms which deflect the logs 
to the American and Canadian sides. Seventy-five men are 
employed at this gap and during the season 150,000,000 board 
feet of logs are handled. 
An assorting device used in the Appalachian region is shown in 
Fig. 145a. This has a sheer boom (A) moored to a tree on the bank 
and braced by a secondary boom at (B) . The boom (A ) is held 
in place in the stream by cables attached as shown in Fig. 1456. 
The lower end of the boom is broken at (C) and may be opened 
to allow logs and driftwood to pass downstream. An assorting 
platform (D), with braces (E) and (F), is provided on which 
the workers stand and shunt the logs to be stored into the pocket 
(G). The remainder pass downstream to other storage pockets 
