On Naval Timber and Arboriculture: With Critical Notes on Authors who have Recently Treated the Subject of PlantingMatthew, Patrick
Science
On Naval Timber and Arboriculture: With Critical Notes on Authors who have Recently Treated the Subject of Planting
Matthew, Patrick
Forests and forestry -- Great Britain
not be of the most valuable and most appropriate figure, he must rank
either with the negligent or the incapable.
Ship timbers being generally required of greater depth than thickness,
that is, broadest in the plane {25} of the curve, hedge-row is better
adapted to growing them than the forest, especially when the trees are
close in the row. The bend generally takes place across the row; and
the bole of the tree acquires a greater diameter in that direction than
in the line of the row. If the figure of the top of a tree be very
elliptical in the horizontal plane, the cross section of the bole,
instead of being circular, will also be elliptical (cake-grown). The
lateral spread of the roots in thick planted rows being greater than
the longitudinal, also tends to give elliptic bole, the stem swelling
most on the sides where the strongest roots enter, which, of course,
always occurs on the sides affording most nourishment. Forests intended
for ship timbers might be planted and kept in rows a considerable
distance apart, with the plants close in the row, and thus acquire the
elliptic bole. This would also facilitate the bending; by being turned
a little right and left alternately, they would spontaneously, from the
weight of the top, and their inclination to avoid the shade of each
other, increase the original bias. Were forests planted in close double
rows, the plants thick in the row, with wide avenues or glades between,
many of the trees would acquire crooked boles, and the crooked might be
retained when thinning. Avenues of this description {26} would form
agreeable diversity from the monotonous irregularity of the forest, and
be highly picturesque.
Were close triple rows planted with wide glades between, having spruce,
larch, birch, or other trees of more rapid growth than the oak in the
mid row, and oak in the side rows, the greater part of the oak would be
thrown out into fine curves by the overshadowing top of the superior
tree. After the oak had received a sufficient side bias, the central
row, which of those kinds comes soon to be of value, might be removed.
The easiest way to procure good oak knees is to look out in hedge-row
and open forest for plants which divide into two or four leaders,
from 3 to 10 feet above ground; and should the leaders not diverge
sufficiently, to train them as horizontally as possible for several
feet, by rods stretching across the top, or by fixing them down by
stakes; see following figures. Figs. _a_, _b_, _f_, are drawn to a
smaller scale than _c_, _d_; of course, a stem, after dividing, never
extends in length below the division. {27}
[Illustration]
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