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Speculum metal is an alloy of four parts copper to one part tin.

It was used by some early telescope makers. For instance, Lord Rosse used it for the mirror of his "Leviathan of Parsonstown" telescope. Has the unfortunate property of tarnishing rapidly, requiring constant re-polishing.

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Topics: Speculum Metal, Speculum Feathers, Speculum (medical)...

SpeculumMeanings of speculum include: A medical tool used for examing body cavities; see Speculum (medical). A small metal mirror used for telescopes. The secondary feathers on the inner part of a duck's wing which are often brightly coloured; see speculum feathe	Speculum feathersmallard hen. The speculum feathers comprise the patch of white-edged blue. The speculum feathers are the inner (secondary) flight feathers of a duck. They are often brightly coloured, especially in dabbling ducks, and can help to identify a duck in flight	Speculum (medical)A speculum is a medical tool for investigating body cavities. Its form is dependent on the body cavity for which it is designed. Ear specula resemble a funnel, and come in a variety of sizes. Nasal specula have two relatively flat blades with handle.
Speculum metalSpeculum metal is an alloy of four parts copper to one part tin. It was used by some early telescope makers. For instance, Lord Rosse used it for the mirror of his "Leviathan of Parsonstown" telescope. Has the unfortunate property of tarnishing rapidly, r	Speculum VitaeMiddle English Poem possibly by William of Nassyngton . Written in the middle or late 14th century. However, the exact date has not been established and there is also debate about whether Nassyngton was the author or not. English literature Medieval liter

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