 | John Shiress Will - Electric engineering - 1903 - 556 pages
...twice its weight of crystals of pure zinc sulphate, and adding zinc oxide in the proportion of about 2 per cent, by weight of the zinc sulphate crystals to neutralise any free acid. The crystals should be dissolved with the aid of gentle heat, but the temperature to which the... | |
 | Frederick Hutton Getman - Chemistry, Physical and theoretical - 1904 - 288 pages
...slightly, but the solution must not be warmed above 30° C. Mercurous sulphate purified as in (c) is added in the proportion of about 12 per cent. by weight of the zinc sulphate crystals to neutralize the free zinc oxide remaining. The solution is then filtered and cooled to 0°. Crystals... | |
 | Francis Bacon Crocker - Electric lighting - 1904 - 590 pages
...is raised must not exceed 30° C. Mercurous sulphate, treated as described in 3, shall be added it» the proportion of about 12 per cent by weight of the zinc sulphate crystals, to neutralize the free zinc oxide remaining, and then the solution filtered, while still warm, into a... | |
 | Great Britain - Administrative law - 1904 - 512 pages
...twice its weight of crystals of pure zinc sulphate, and adding zinc oxide in the proportion of about 2 per cent, by weight of the zinc sulphate crystals to neutralise any free acid. The crystals should be dissolved with the aid of gentle 'heat, but the temperature to which the... | |
 | United States. Bureau of Standards - Physics - 1905 - 542 pages
...the solution is raised should not exceed 30° C. Mercurous sulphate treated as hereinafter described should be added in the proportion of about 12 per cent by weight of the zinc sulphate crystals and the solution filtered, while still warm, into a stock bottle. Crystals should form as it cools.... | |
 | John Roberts (Electrical engineer.) - Electric engineering - 1906 - 238 pages
...the aid of gentle heat, but the temperature to which the solution is raised should not exceed 30° C. Mercurous sulphate treated as described in 3 should...per cent, by weight of the zinc sulphate crystals to neutralize any free oxide remaining, and the solution filtered, while still warm, into a stock bottle.... | |
 | Thomas Ernest Herbert - Telegraph - 1906 - 946 pages
...the aid of gentle heat, but the temperature to which the solution is raised should not exceed 30° 0. Mercurous sulphate treated as described in 3 should...per cent, by weight of the zinc sulphate crystals to neutralize any free zinc oxide rcmaining, and the solution filtered, while still warm, into a stock... | |
 | Thomas Ernest Herbert - Telegraph - 1906 - 944 pages
...gentle heat, but the temperature to which the solution is raised should not exceed 30° C. Mereurous sulphate treated as described in 3 should be added...per cent, by weight of the zinc sulphate crystals to neutralize any free zinc oxide remaining, and the solution filtered, while still warm, into a stock... | |
 | William Hallock, Herbert Treadwell Wade - Metric system - 1906 - 334 pages
...the solution is raised must not exceed 30° C. Mercurous sulphate, treated as described in 3, shall be added in the proportion of about 12 per cent, by weight of the zinc sulphate crystals to neutralize the free zinc oxide remaining; and then the solution filtered, while still warm, into a... | |
 | Harry Robert Kempe - Electric measurements - 1908 - 730 pages
...which the solution is raised should not exceed 30C C. Mercuruus sulphate treated as described in (;() should be added in the proportion of about 12 per...and the solution filtered, while still warm, into a slock bottle. Crystals should form as it cools. (5) The MercuTout Sulphate and Zinc Sulphatu Puele.... | |
| |
... any free acid. The crystals should be dissolved with the aid of gentle heat, but the temperature to which the solution is raised should not exceed 30° C. 
