An impression of the metal was obtained in fusible metal, which is an alloy composed of tin, lead, and bismuth, melted together in the proportions of two of the latter to one each of the former. 弗雷德里克·科利尔·贝克维尔.伟大的事实.
The matrices thus obtained were in like manner impressed on a fusible metal, which melted at a lower temperature than the lead. 弗雷德里克·科利尔·贝克维尔.伟大的事实.