Читать книгу The Art in Ancient Egypt - Perrot Georges - Страница 33

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Carpentry, or construction by assemblage, played a considerable part in ancient Egypt, but, as may easily be understood, few traces of it are to be found in our day. Those edifices which were constructed of wood have, of course, all perished; but, in spite of their disappearance, we can form a very good idea of their aspect and of the principles of their construction. In the most ancient epoch of Egyptian art, the people took pleasure in copying, in their stone buildings, the arrangements which had characterised their work in wood; besides which, their paintings and reliefs often represent buildings of the less durable material. The constructive principles which we have next to notice, have thus left traces behind them which will enable us to describe them with almost as much accuracy as if the carpenters of Cheops and Rameses were working before our eyes.

We need not insist upon the characteristics which distinguish assembled construction from masonry or brickwork. The different parts of the former are, of course, much more intimately allied than in buildings constructed of large stones. Supports of dressed stone truly fixed with the plumb line are perfectly stable of themselves.

In both Egypt and Greece we often come upon a few columns still standing upright amid their desolate surroundings, and announcing to the traveller the site of some city or famous temple which has been long destroyed. But wooden supports have little thickness in comparison with their height, and the material of which they are formed, being far less dense than stone, cannot maintain itself in place by its own weight. It is the same with wooden architraves. The heaviest beams of wood will not keep their places when simply laid one upon another, and are in that matter far inferior to those well dressed stones which, in so many ancient walls, have resisted change with neither tenons nor cement to help them.

As a general principle, when wood has to be employed to the best advantage, and endowed with all the solidity and resisting power of which it is capable, the separate pieces must be introduced one into another (Fig. 82). But even when thus combined and held in place by mechanical contrivances, such as bolts and nails, they will never form a homogeneous and impenetrable mass like brick or stone. By such methods an open structure is obtained, the voids of which have afterwards to be filled up by successive additions, and these additions often take the form of what we call panels.

We may look upon the different faces of a wooden building as separate pieces of construction which should be put together upon the ground before being combined with each other. This process, though not always made use of in practice, is at least the most logical method for those who wish to make the best use of their materials. But even when thus put together, one of these single faces has not much more stability than each of its constituent elements. In order to form a rigid and stable whole, the several faces must be allied by reciprocal interpenetration at the angles.

It was necessary to call attention once for all to these general characteristics of wooden construction, because we shall hereafter have occasion to examine the forms and motives which stone architecture borrowed from wood in the case of other people besides the Egyptians. We must now determine the particular characteristics offered by the material in Egypt, as they may be learnt in the representations to which we have already referred.

Fig. 82.—Elements of wooden construction.

When a wall has to be built of wood so as neither to warp nor give way, it is necessary to make use of a certain number of oblique members. This is one of the elementary rules of the carpenter's art, and to form an idea how it was applied in our own country it is enough to cast an eye over any of the wooden buildings of the middle ages or of the renaissance. The Egyptians were not ignorant of the advantages conferred by the use of these oblique members because they employed them frequently in their furniture; but they seem never to have introduced them into the construction of their buildings. All joints are there made at a right angle. They were probably led to reject oblique lines by their unwillingness to break in upon the simple harmony of vertical and horizontal lines which is the distinguishing principle of all their architecture. Thus self-deprived of a valuable resource, they were driven to the discovery of some other means of giving the required cohesion and stability to their walls. This requirement they thought they had fulfilled in exaggerating the points of connection between the vertical and horizontal members, which were thus brought into more intimate relation than would in these days be thought necessary.[107] The consequence of this was that their wooden buildings presented much the same closed appearance (Fig. 83) as we have already noticed in their stone constructions; and, moreover, as every joint was made at right angles, the pyramidal form was entirely absent.

Fig. 83.—Wooden building (first system), composed by Charles Chipiez.[108]

But the Egyptians also made use of wood for buildings very different from those to which we have hitherto alluded. Those were closed; but we have now to speak of another system, of one which, by contrast, might be called an open system of construction. The edifices upon which it was employed were generally of small size, and in this respect resembled those which we have described, but they were distinguished by a different system of carpentering. We know them only by the figured representations which have come down to us, for they were little calculated to outlast the centuries (Fig. 84). This second system lends itself as little as the first to pyramidal and kindred forms; horizontal lines, also, were in it of but secondary importance. Composed of a few vertical members bound together at the top, such a building was allied to the portico type which has already been described. This method of carpentry seems to have been used only for subordinate buildings; but yet it should not be passed by in silence. It was frequently used for the construction of light decorative pavilions, and it had a set of principles which are as susceptible of definition as those of the most ambitious architecture.

Fig. 84.—Wooden building (second system), composed by Charles Chipiez.

Metal must have entered into the construction of these pavilions. It may have furnished either the horizontal or the vertical members, and it is certain that it was partly used for the roofs.

In all wooden structures the roof must also be of wood, because the light walls which are proper to the material could not support the great weight of a flat stone covering, still less could they stand up against the combined weight and thrust of a stone or brick vault, which would destroy them in very summary fashion.