| 单词 | colorific acids |
| 释义 | > as lemmascolorific acids ΚΠ 1807 T. Thomson Syst. Chem. (ed. 3) II. 326 Under the name of colorific acids..I include three substances, which possess such analogous properties that they ought to be classed together... Two of these bodies, namely, prussic and gallic acids, have been long considered as acids by chemists... A third of them, sulphureted hydrogen, has been shown by Berthollet to act as an acid. 1813 J. Millard Pocket Encycl. (ed. 2) vii. 535 Colorific acids, or those which cause colour, are the prussic, which is the colouring matter of prussian blue, and the gallic acid obtained from nut-galls. 1827 J. Mitchell First Lines Sci. xiii. 222 The acids have been divided by Dr. Thomson into acid products, acid supporters, combustible acids, and colorific acids. < as lemmas |
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