We shall speak of the loadstone in its proper place,1680 and of the sympathy which it has with iron. This is the only metal that acquires the properties of that stone, retaining them for a length of time, and attracting other iron, so that we may sometimes see a whole chain formed of these rings. The lower classes, in their ignorance, call this “live iron,” and the wounds that are made by it are much more severe. This mineral is also found in Cantabria, not in continuous strata, like the genuine loadstone, but in scattered fragments, which they call “bullationes.”1681 I do not know whether this species of ore is proper also for the fusion of glass,1682 as no one has hitherto tried it; but it certainly imparts the same property as the magnet to iron. The architect Timochares,1683 began to erect a vaulted roof of loadstone, in the Temple of Arsinoë,1684 at Alexandria, in order that the iron statue of that princess might have the appearance of hanging suspended in the air:1685 his death, however, and that of King Ptolemæus, who had ordered this monument to be erected in honour of his sister, prevented the completion of the project.