We have in Italy some woods that are apt to split of themselves: to prevent this, architects recommend that they should be first seasoned in manure[2729] and then dried, in order to render them proof against the action of the atmosphere. The woods of the fir and larch are well adapted, even when used transversely, for the support of heavy burdens; while the robur and the olive are apt to bend and give way under a weight. The wood of the poplar and the palm are also strong, but this last will bend, though in a manner different from the others; for, while in all other instances the wood bends downwards, in the palm it bends in the contrary direction,[2730] and forms an arch. The woods of the pine and the cypress are proof against decay and all attacks of wood-worm. The walnut is easily warped, but we sometimes see beams even made of it. It gives warning, however, before it breaks, by a loud cracking noise; such was the case at Antandros, at the public baths there—the bathers took the alarm upon hearing the beams crack, and made their escape. The pine, the pitch-tree, and the alder are employed for making hollow pipes for the conveyance of water, and when buried in the earth will last for many years. If, however, they are not well covered over, they will very soon rot; and the resistance they offer to decay will increase in a most surprising degree if the outer surface as well is left in contact with the water.
CHAP. 82.—CARPENTERS’ WOODS.
The wood of the fir is strongest in a vertical[2731] position: it is remarkably well adapted for the pannels of doors, and all kinds of in-door joiners’ work, whether in the Grecian, the Campanian, or the Sicilian style. The shavings of this wood when briskly planed, always curl up in circles like the tendrils of the vine. This wood, too, unites particularly well with glue: it is used in this state for making vehicles, and is found to split sooner in the solid parts than in a place where the pieces have been glued together.
CHAP. 83. (43.)—WOODS UNITED WITH GLUE.
Glue, too, plays one of the principal parts in all veneering and works of marqueterie. For this purpose, the workmen usually employ wood with a threaded vein, to which they give the name of “ferulea,” from its resemblance to the grain of the giant fennel,[2732] this part of the wood being preferred from its being dotted and wavy. In every variety there are some woods to be found that will not take the glue, and which refuse to unite either with wood of the same kind or of any other; the wood of the robur for example. Indeed, it is mostly the case that substances will not unite unless they are of a similar nature; a stone, for instance, cannot be made to adhere to wood. The wood of the service-tree, the yoke-elm, the box, and, in a less degree, the lime, have a particular aversion to uniting with the cornel. All the yielding woods which we have already spoken[2733] of as flexible readily adapt themselves to every kind of work; and in addition to them, the mulberry and the wild fig. Those which are moderately moist are easily sawn and cut, but dry woods are apt to give way beyond the part that is touched by the saw; while, on the other hand, the green woods, with the exception of the robur and the box, offer a more obstinate resistance, filling the intervals between the teeth of the saw with sawdust, and rendering its edge uniform and inert; it is for this reason that the teeth are often made to project right and left in turns, a method by which the saw-dust is discharged. The ash is found the most pliable wood of all for working; and, indeed, for making[2734] spears it is better even than the hazel, being lighter than the cornel, and more pliable than the wood of the service-tree. The Gallic variety is so supple, that it is employed in the construction of vehicles even. The elm would rival the trunk of the vine[2735] for some purposes, were it not that its weight is so much against it.
CHAP. 84.—VENEERING.
The wood, too, of the beech is easily worked, although it is brittle and soft. Cut into thin layers of veneer, it is very flexible, but is only used for the construction of boxes and desks. The wood, too, of the holm-oak is cut into veneers of remarkable thinness, the colour of which is far from unsightly; but it is more particularly where it is exposed to friction that this wood is valued, as being one to be depended upon; in the axle-trees of wheels, for instance; for which the ash is also employed, on account of its pliancy, the holm-oak for its hardness, and the elm, for the union in it of both those qualities. There are also various workman’s tools made of wood, which, though but small, are still remarkably useful; in this respect, it is said that the best materials for making auger handles are the wild olive, the box, the holm-oak, the elm, and the ash. Of the same woods also mallets are made; the larger ones, however, are made of the pine and the holm-oak. These woods, too, have a greater degree of strength and hardness if cut in season than when hewn prematurely; indeed, it has been known for hinge-jambs, made of olive, a wood of remarkable hardness, after having remained a considerable time on the spot, to put out buds[2736] like a growing plant. Cato[2737] recommends levers to be made of holly, laurel, or elm; and Hyginus speaks highly of the yoke-elm, the holm-oak, and the cerrus, for the handles of agricultural implements.
The best woods for cutting into layers, and employing as a veneer for covering others, are the citrus, the terebinth, the different varieties of the maple, the box, the palm,[2738] the holly, the holm-oak, the root of the elder, and the poplar. The alder furnishes also, as already stated,[2739] a kind of tuberosity, which is cut into layers like those of the citrus and the maple. In all the other trees the tuberosities are of no value whatever. It is the central part of trees that is most variegated, and the nearer we approach to the root the smaller are the spots and the more wavy. It was in this appearance that originated that requirement of luxury which displays itself in covering one tree with another, and bestowing upon the more common woods a bark of higher price. In order to make a single tree sell many times over, laminæ of veneer have been devised; but that was not thought sufficient—the horns of animals must next be stained of different colours, and their teeth cut into sections, in order to decorate wood with ivory, and, at a later period, to veneer it all over. Then, after all this, man must go and seek his materials in the sea as well! For this purpose he has learned to cut tortoise-shell into sections; and of late, in the reign of Nero, there was a monstrous invention devised of destroying its natural appearance by paint, and making it sell at a still higher price by a successful imitation of wood.
It is in this way that the value of our couches is so greatly enhanced; it is in this way, too, that they bid the rich lustre of the terebinth to be outdone, a mock citrus to be made that shall be more valuable than the real one, and the grain of the maple to be feigned. At one time luxury was not content with wood; at the present day it sets us on buying tortoise-shell in the guise of wood.