| John Mitchell (F.C.S.) - 1846 - 448 lapas
...charcoal, enveloped in a piece of paper, and struck lightly with a hammer, by which means the phosphuret of iron is separated from the surrounding flux. It...magnet, frangible on the anvil, the fracture having the colour of iron. If the substance under assay contained no phosphoric acid, the iron wire will keep... | |
| John Mitchell (F.C.S.) - 1846 - 450 lapas
...charcoal, enveloped in a piece of paper, and struck lightly with a hammer, by which means the phosphuret of iron is separated from the surrounding flux. It...magnet, frangible on the anvil, the fracture having the colour of iron. If the substance under assay contained no phosphoric acid, the iron wire will keep... | |
| John Mitchell (analytical chemist.) - 1854 - 608 lapas
...charcoal, enveloped in a piece of paper, and struck lightly with a hammer, by which means the phosphuret of iron is separated from the surrounding flux. It...magnet, frangible on the anvil, the fracture having the colour of iron. If the substance under assay contained no phosphoric acid, the iron wire will keep... | |
| John Mitchell (F.C.S.) - 1868 - 840 lapas
...charcoal, enveloped in a piece of paper, and struck lightly with a hammer, by which means the phosphuret of iron is separated from the surrounding flux. It...magnet, frangible on the anvil, the fracture having the colour of iron. If the substance under assay contained no phosphoric acid, the iron wire will keep... | |
| William Elderhorst - 1873 - 314 lapas
...iron is oxidized at the expense of the phosphoric acid, causing the formation of a borate of the oxide of iron, which fuses at a sufficiently high temperature....metallic lustre, excepting at the ends, where it will be oxidized and burnt. The substance to be assayed ought not to contain sulphuric acid, arsenic acid,... | |
| William Elderhorst - 1874 - 340 lapas
...iron is oxidized at the expense of the phosphoric acid, causing the formation of a borate of the oxide of iron, which fuses at a sufficiently high temperature....metallic lustre, excepting at the ends, where it will be oxidized and burnt. The substance to be assayed ought not to contain sulphuric acid, arsenic acid,... | |
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