 ... above are clearly reflected. The clay ring may be withdrawn by lifting the plate B. A less perfect exclusion of air may be obtained by employing a narrow crucible placed rather low down in its support. A small iron dish should be placed beneath the...  A Manual of Practical Assaying - Стр. 96авторы: John Mitchell (F.C.S.) - 1868 - Страниц: 697Полный просмотр - Подробнее о книге
 | 1863 - Страниц: 640
...letters patent, and may be obtained of the licensed manufacturer, EW Ball, ji, Islington, Birmingham. The chief conditions of success in the use of this...degree of draught, and proper regulation of gas to air. Note. — I beg to acknowledge the assistance 1 have received from Mr. Thomas Simons, crucible maker,... | |
 | Andrew Ure - 1867 - Страниц: 918
...letters patent, and may be obtained of the licensed manufacturer, EW Ball, 11 Islington, Birmingham. The chief conditions of success in the use of this furnace are sufficient ijas, a suitable degree of draught, and proper regulation of gas to air. Several very ingenious furnaces... | |
 | John Mitchell (F.C.S.) - 1868 - Страниц: 802
...hole D is open some air is drawn in that way, and less air passes up with the gas through the tube O, but the cold air does not much diminish the temperature...temperature without the use of a blowing machine. It is especially suitable for assay purposes on a small scale and for the decomposition of siliceous minerals... | |
 | John Mitchell (F.C.S.) - 1868 - Страниц: 840
...way, and less air passes up with the gas through the tube 0, but the cold air does not much dimmish the temperature of the crucible, because it combines...temperature without the use of a blowing machine. It is especially suitable for assay purposes on a small scale and for the decomposition of siliceous minerals... | |
 | 1863 - Страниц: 1516
...is protected by letters patent, and may be obtained of the maker, EW Ball, 11 Islington, Birmingham. The chief conditions of success in the use of this furnace are, sufficient gas, proper regulation of gas to air, and a suitable degree of draught. Note. — I beg to acknowledge the... | |
 | 1863 - Страниц: 1212
...protected by letters patent, and may be obtained of the maker, EW Ball, 1 1 Islington, Birmingham. The chief conditions of success in the use of this furnace are, sufficient gas, proper regulation of gas to air, and a suitable degree of draught. Note. — I beg to acknowledge the... | |
| |
