Full resolution (JPEG) - On this page / på denna sida - Second part - VII. Forestry - 2. Forest Industries. By E. Arosenius, Ph. D., Royal Central Bureau of Statistics, Stockholm - Floating, by Th. Örtenblad, Chief Master of Forest, Umeå
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FLOATING.
655
In front of the inlet of the channel there are leader-looms, so that the
timber is carried forward by the current, toward the opening, where there are
always workmen posted, however, to regulate the entrance of the logs, which
should enter the channel evenly and so slowly that they do not accumulate in
such numbers as to burst the channel. By means of a system of signals it is
rendered possible, if necessary, to give notice from any part of the channel when
the feeding in of the logs is to be interrupted. The lower end of the channel
has a slight inclination, so that the logs will not strike against the bottom when
they leave the channel. If the water-course is shallow here, there is built below the
trough of the channel a »slidingbottom®, of round timber, over which the logs
slide; thus, this flooring receives the first shock of the issuing logs.
Other constructions also occur in the floating-ways, such as fascine-coffers,
canals dug in the ground, etc. The most important means for regulating the
floating ways is, however, the blasting of rocks, and their subsequent clearing
from the bottom.
Floating-channel.
The work of floating commences simultaneously with the breaking
up of the ice in spring. Especially on the smaller floating-ways, it
is important to make good use of the time; in certain cases, one day’s
delay may be the cause of part of the logs remaining unfloated till
the next year. The same result may ensue in case the number of
workmen (or drivers) is insufficient. The timber may be floated
separately or united in rafts; the latter method of floating being especially
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