392 



WOOD TRANSPORT BY WATER. 



portions, a raft 354 feet long, constructed of railway-sleepers 

 as shown in Fig. 265, and a line of logs. The raft is fixed at 

 one end to a rock on the right-hand side of the river, and kept 

 obliquely inclined towards the current by wire ropes anchored 

 to the other bank. This portion of the boom is placed in the 

 full current of the powerful stream. From its other end extends 

 a line of logs fastened end to end by a wire rope, and 910 feet 

 long. The floating sleepers are stopped by the raft-boom, and 

 then float along the line of logs into slack-water, when they are 



PLAN 



ELEVATION (up-sl ream edge of Boom) 



Support :? *^=j| , 

 Iron rndx*2.Cir.l II -I 



Iron 



Fig. 265. Daghpathar boom. 

 Drawn by A. G. Hobart-Hami><lfii. 



caught easily by men swimming on inflated buffalo-skins, and 

 landed. 



The construction of the raft-boom is as follows : 

 Two broad-gauge sleepers are placed 6j feet apart and with 

 their broad face vertically downwards ; transversely to these 

 and dovetailed or merely let-in, are placed at intervals of 

 about one foot meter-gauge sleepers with the broad face hori- 

 zontal. In the centre are two planks placed longitudinally 

 and serving as a footway. A wire rope runs along each side, 

 and is firmly fixed to the broad-gauge sleepers. This is to give 

 the boom flexibility against sudden strains. Below the sleepers 



