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Mirror - LoveToKnow 1911 (3055 words) |
 | In its usual forms it is simply a highly polished sheet of metal or of glass (which may or may not be covered, either behind or before, with a metallic film); a metallic mirror is usually termed a speculum. |
| In the former method there is employed a horizontal double-bottomed metallic table, which is heated with steam to from 35° to 40° C., and the reduction of the ammoniacal silver solution is effected with tartaric acid. |
| To protect the thin metallic film from mechanical injury and the chemical action of gases and vapours it is coated with shellac or copal varnish, over which, when dry, are applied two coatings of red-lead paint or an electrolytically-deposited film of copper. |
| Highbeam Encyclopedia - Search Results for speculum (1199 words) |
| a metal or plastic instrument that is used to dilate an orifice or canal in the body to allow inspection. |
| He was the author of three of the four parts of the Speculum majus, of great value as a summary of the knowledge of his time. |
| She examined the uses and misuses of language in relation to women in such works as Speculum of the Other Woman (1974), which argues that history and culture are written in patriarchal language and centred on men, and that the... |
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