| 释义 |
Definition of speculum metal in English: speculum metalnoun mass nounAn alloy of copper and tin used to make mirrors, especially formerly for telescopes. Example sentencesExamples - The composition is 7 of tin to 22 of copper, melted twice over, as in speculum metal, to secure a perfect alloy.
- The original mirror, currently on display in Liverpool Museum, was cast in speculum metal, a special alloy of copper and tin.
- At first he tried to follow Newton's advice and make glass mirrors back-coated with a tin-mercury amalgam, but he soon switched to speculum metal.
- They are now made by ruling, with a diamond-point, a polished surface, such as glass or speculum metal.
- They were made of low-reflectivity speculum metal - a copper - tin alloy containing 45 percent tin.
Definition of speculum metal in US English: speculum metalnoun An alloy of copper and tin used to make mirrors, especially formerly for telescopes. Example sentencesExamples - They are now made by ruling, with a diamond-point, a polished surface, such as glass or speculum metal.
- The composition is 7 of tin to 22 of copper, melted twice over, as in speculum metal, to secure a perfect alloy.
- At first he tried to follow Newton's advice and make glass mirrors back-coated with a tin-mercury amalgam, but he soon switched to speculum metal.
- The original mirror, currently on display in Liverpool Museum, was cast in speculum metal, a special alloy of copper and tin.
- They were made of low-reflectivity speculum metal - a copper - tin alloy containing 45 percent tin.
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