FLOATi:^Ci. 



407 



is quite usual to convey logs iu those temporary rafts, screw 

 steam-boats of light draught are attached to them, or they are 

 dragged forwards by ropes attached to windlasses on boats 

 anchored in the lake. This 



practice is in vogue on the Fig. 240. 



Tegern lake (fig. 240). The 

 wood floated down the river 

 Weisach runs into the lake at 

 (((), is bound into temporary 

 rafts and drawn by the anchored 

 boat (m) to about the middle 

 of the lake, whence the moun- 

 tain-wind blows it to ((/) at the 

 other end of the lake. The 

 rafts which are collected there 

 are opened one by one, and the 

 wood floated on the Mangfall 

 river to the timber-depot at 

 Thalham, where it reaches the 

 rail-road to Munich. 



(e) Completion of the floating. 

 — All the wood which has been 

 launched by no means floats 

 steadily down to the boom. 

 Frequently, a considerable per- 

 centage of the launched pieces 

 remains on rocks, shoals, and 

 other inequalities of the chan- 

 nel, sticks under its banks, 

 or remains floating in the still 

 water near the banks. All this 

 wood should now be set free, 

 drawn into the stream, or else 

 placed so that it may be caught 



by the next flood from a reservoir, or natural flooding of the river, 

 and carried down to the boom ; this operation is termed after- 

 floating. This work, which is often protracted well into the 

 summer, is usually commenced from up-stream, but if after all 

 the reservoirs are exhausted, or owing to unfavourable Aveather 



