| 单词 | bologna spar |
| 释义 | > as lemmasBologna spar Bologna spar n. native sulphate of baryta found near Bologna, having phosphorescent properties. ΘΚΠ the world > matter > light > light emitted under particular conditions > [noun] > phosphorescence > phosphorescent substance or organism > Bologna spar Bolognian stone1674 Bologna phosphorus1875 Bologna spar1875 Montalbano's phosphorus1906 1875 R. Hunt & F. W. Rudler Ure's Dict. Arts (ed. 7) I. 295 Bologna spar is notable for phosphorescence..when heated; the so-called ‘Bologna Phosphorus’ was made by powdering this stone, and cementing the powder into the form of sticks, by means of gum. < as lemmas |
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