The methods pursued by the Phoenician glass-manufacturers were probably much the same as those which are still employed for the production of similar objects, and involved the use of similar implements, as the blowpipe, the lathe, and the graver. The materials having been procured, they were fused together in a crucible or melting-pot by the heat of a powerful furnace. A blowpipe was then introduced into the viscous mass, a portion of which readily attached itself to the implement, and so much glass was withdrawn as was deemed sufficient for the object which it was designed to manufacture. The blower then set to work, and blew hard into the pipe until the glass at its lower extremity began to expand and gradually took a pear-shaped form, the material partially coolling and hardening, but still retaining a good deal of softness and pliability. While in this condition, it was detached from the pipe, and modelled with pincers or with the hand into the shape required, after which it was polished, and perhaps sometimes cut by means of the turning-lathe. Sand and emery were the chief polishers, and by their help a surface was produced, with which little fault could be found, being smooth, uniform, and brilliant. Thus the vessel was formed, and if no further ornament was required, the manufacture was complete--a jug, vase, alabastron, amphora, was produced, either transparent or of a single uniform tint, which might be white, blue, brown, green, &c., according to the particular oxide which had been thrown, with the silica and alkali, into the crucible. Generally, however, the manufacturer was not content with so simple a product: he aimed not merely at utility, but at beauty, and proceeded to adorn the work of his hands--whatever it was--with patterns which were for the most part in good taste and highly pleasing. These patterns he first scratched on the outer surface of the vessel with a graving tool; then, when he had made his depressions deep enough, he took threads of coloured glass, and having filled up with the threads the depressions which he had made, he subjected the vessel once more to such a heat that the threads were fused, and attached themselves to the ground on which they had been laid. In melting they would generally more than fill the cavities, overflowing them, and protruding from them, whence it was for the most part necessary to repeat the polishing process, and to bring by means of abrasion the entire surface once more into uniformity. There are cases where this has been incompletely done and where the patterns project; there are others where the threads have never thoroughly melted into the ground, and where in the course of time they have partially detached themselves from it; but in general the fusion and subsequent polishing have been all that could be wished, and the patterns are perfectly level with the ground and seem one with it.[846]