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" ... 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 "
Guide to the Practical Elements of Electrical Testing - Page 39
by J. Warren - 1901 - 186 pages
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Magnets and Electric Currents: An Elementary Treatise for the Use of ...

John Ambrose Fleming - Electric apparatus and appliances - 1914 - 408 pages
...30 C. Mercurous sulphate, treated as described in c, should be added in the proportion of about 12 per cent. by weight of the zinc sulphate crystals to neutralise any free zinc oxide remaining, and the solution filtered, while still warm, into a stock bottle. Crystals should...
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Report of the Annual Meeting, Volume 64, Part 1894

British Association for the Advancement of Science. Meeting - Science - 1894
...30 C. Mercurous sulphate treated as described in 3 should be added in the proportion of about 12 per cent, by weight of the zinc sulphate crystals to neutralise any free zinc oxide remaining, and the solution filtered, while still warm, into a stock bottle. Crystals should...
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Statutory Rules and Orders Other Than Those of a Local, Personal ..., Volume 13

Great Britain - Delegated legislation - 1904
...C. Merounous sulphate treated as described in 3 should be added in the proportion of about 12 pei- cent, by weight of the zinc sulphate crystals to neutralise any free zinc oxide remaining, and the solution filtered, while still warm, into a stock bottle. Crystals should...
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Annual Report - National Academy of Sciences

National Academy of Sciences (U.S.) - Academies and institutes - 1883
...proportion of about 2 pe cent by weight of the zinc sulphate crystals to neutralize any free aeiti. The crystals should be dissolved with the aid of gentle heat, but thi temperature to which the solution is raised must not exceed 30 C. Mercurous sulphate, treated...
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The Electrical Review, Volume 32

Electric engineering - 1893
...water, with nearly twice ita 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. (See notes below.) The crystals should be dissolved with the aid of gentle beat, but the temperature...
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Bulletin of the Bureau of Standards, Volume 1

United States. National Bureau of Standards - Physics - 1904
...distilled water with nearly 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 neutralize any free acid. The crystals should be dissolved with the aid of gentle heat, but the temperature...
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