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THREE:The means of supporting cores must be devised, or at least understood, by pattern-makers; these supports consist of 'prints' and 'anchors.' Prints are extensions of the cores, which project through the casting and extend into the sides of the mould, to be held by the sand or by the flask. The prints of cores have duplicates on the patterns, called core prints, which are, or should be, of a different colour from the patterns, so as to distinguish one from the other. The amount of surface required to support cores is dependent upon their weight, or rather upon their cubic contents, because the weight of a core is but a trifling matter [96] compared to its floating force when surrounded by melted metal. An apprentice in studying devices for supporting cores must remember that the main force required is to hold them down, and not to bear their weight. The floating force of a core is as the difference between its weight and that of a solid of metal of the same size��a matter moulders often forget to consider. It is often impossible, from the nature of castings, to have prints large enough to support the cores, and it is then effected by anchors, pieces of iron that stand like braces between the cores and the flasks or pieces of iron imbedded in the sand to receive the strain of the anchors.After the explanations required of us they allowed us to go on. The incessant roar of the guns made the girl tremble for fear, and the stinging smoke made her cough. After much trouble we got at last as far as Herstal, where I had promised her a short rest.

THREE:Leona Lalage intimated that was the only thing she desired for the moment. But at the same time she made it pretty clear to Prout that the thing was impossible. Her keen desire was to show him the impossibility of the proceeding, and induce him to give up any further investigations in that direction.