Bolognian phosphorus

noun

(obsolete, inorganic chemistry) A poorly-characterized phosphorescent substance obtained by heating barium sulfate.

Bolognian phosphorus was once used as a source of light in early photography.

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意味（1）

(obsolete, inorganic chemistry) A poorly-characterized phosphorescent substance obtained by heating barium sulfate.

and the Bolognian phosphorus, discovered by Vincenzo Cascariolo, a shoemaker of Bologna, is made by reducing compact sulphate of baryta to a fine powder, which is formed into cakes with mucilage, and these are heated to redness.

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Bolognian phosphorus

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