In spite of war industrial arts were making progress, which was stimulated by war itself. Copper was abundant in Cornwall, Cardiganshire and Anglesey, and near Llandudno: tin was to be had near the surface in Cornwall,[551] and perhaps first attracted attention where it was associated with gold; native smiths began to copy the tools which were brought from abroad; and insular forms were gradually evolved. Among the immigrants there must have been some who were acquainted with metallurgy; and just as the modern coach-builder finds himself obliged to manufacture motor-cars, so, we may be sure, the more enterprising cutlers who had hitherto made stone implements gradually learned to produce tools of copper or bronze. The metals were of course not at first procured by mining. Copper would be obtained from boulders or from lumps of ore on hill-sides, and tin from the gravel beds of streams. The methods, which have been recorded by modern observers, of primitive communities are probably much the same as those of the Britons of the Bronze Age. The original furnaces differed hardly at all from the fires at which food was cooked. The fire was kindled within a fire-place of large stones, underneath which was a pit. The wind, rushing through the crevices of the stones, created a draught, which may have been forced by some rude bellows. After the embers and the slag had been raked away the molten metal in the pit was watched until it was on the point of becoming solid, when the copper cakes were snatched out and broken into the lumps of which specimens have been found in bronze-founders’ hoards. For the smelting of tin a method may have been adopted which was still practised in Germany in the Middle Ages. A trench was filled with brushwood, above which logs were piled; and as soon as the fuel was aglow the ore was pitched on to the fire until a sufficient amount had accumulated. Then the embers were raked away, and the molten tin ladled out.[552] It is worthy of remark that all the Scottish bronze implements which had been analysed up to the year 1880 contained lead;[553] and one may perhaps infer that the tin which was exported from Cornwall to Scotland was not pure.
Bronze Implements:—celts.
Many bronze implements were reproductions, more or less modified, of neolithic models. Stone celts, knives, daggers, spear-heads, awls, chisels, gouges, sickles, and saws have their successors in bronze. Gradually, however, new forms were developed or invented. Bronze was of course at first reserved for weapons; and knives or knife-daggers probably preceded all others, because the metal was originally too scarce and expensive to be used for those which required a large expenditure of material.[554] Flat axes, resembling more or less closely the polished neolithic celts, were, however, manufactured early in the Bronze Age. After some time the sides of the narrow part of the celt, above the cutting edge, were hammered upwards,—probably in order to steady the blade against a lateral strain; and thus by insensible gradations the flat was transformed into the flanged celt; while a projection, commonly called a stop-ridge, was cast on the narrow part of the blade with the object of preventing it from being forced too far into its wooden haft. As the flanges became more marked, they were first confined to the upper part of the tool, and afterwards developed into wings which were hammered inwards so as to form a kind of rudimentary socket.[555] Celts of this form are called palstaves,—a word of Icelandic origin, which denotes a spade. In palstaves of another kind the part between the wings and above the stop-ridge was cast thinner than the rest, so that a groove appeared into which the haft could be securely fitted; and a loop was often added at one side to enable the attachment to be secured by bands of twine.[556] The final improvement was to cast the blade with a socket for the reception of the handle: but palstaves remained in use down to the very end of the Bronze Age;[557] while in some socketed celts the wings survive as mere ornaments upon the sides.[558] Like palstaves nearly all socketed celts are looped on one side, and a few on both.[559] Naturally the socket was not limited to celts, but applied also to knives,[560] chisels,[561] gouges,[562] and other tools. Socketed knives, however, are very rare in Scotland; and on the Continent, except in Northern France, they are almost unknown.[563] On the other hand the patterns of our socketed chisels and gouges appear to have been derived from some foreign source.[564]
Fig. 18. ½
Fig. 19. ½
Fig. 20. ½
