= touch needle n. at touch, n. compounds 2. Cf. proof needle n. at proof, n. compounds 2. Obsolete.
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| 单词 | θ213022 |
| 释义 | society > occupation and work > equipment > metalworking equipment > [noun] > equipment for testing quality of metal (11) needle1469 = touch needle n. at touch, n. compounds 2. Cf. proof needle n. at proof, n. compounds 2. Obsolete. touchstone1530 Fine-grained black stone (typically a type of chert) upon which objects made of gold or silver can be rubbed to determine their purity; a piece of… parting glass1594 a glass vessel used in parting gold and silver with acid. proof needle1683 a needle used for testing something; spec. = touch needle n. at touch, n. compounds 2. stroking needle1683 = touch needle n. at touch, n. compounds 2. touch needle1683 †(a) the magnetic needle of a compass (cf. sense 11) (obsolete rare); (b) any of a set of needles or small bars of gold or silver of varying purity… Lydian-stone1720 a black variety of jasper (basanite) used by jewellers as a touchstone for testing gold. scorifier1758 A vessel of fire-clay used in the process of the purification of metals in assaying. sebilla1839 A wooden bowl used in the mechanical assay of ores. sonometer1849 Any of various instruments capable of producing sounds of known or measurable volume. Now historical. quantometer1927 A type of automatic spectrograph used esp. for determining the composition of alloys. |
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