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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 C. "
Guide to the Practical Elements of Electrical Testing - Page 39
by J. Warren - 1901 - 186 pages
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Outlines of Electrical Engineering

Harold H. Simmons - Electric engineering - 1908 - 920 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...
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Reprints of Papers

Carl Hering - 1910
...solution is raised should not exceed 30 deer. C. Mercnrous sulphate treated as describe! in paragraph 4 should be added in the proportion of about 1'2 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....
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Reports of the Committee on Electrical Standards Appointed by the British ...

British Association for the Advancement of Science. Committee on Electrical Standards - Electric measurements - 1913 - 783 pages
...which the solution is raised should not exceed 30 C. Mercurous sulphate treated as described in 4 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....
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Electrical Engineer's Pocket-book

Horatio Alvah Foster - Electric engineering - 1913 - 1614 pages
...the solution is raised must not exceed 30 C. Mercurous sulphate, treated as described in 3, shall neutralize the free zinc oxide remaining, and then the solution filtered, while still warm, into a...
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Report of the Annual Meeting, Volume 64, Part 1894

British Association for the Advancement of Science. Meeting - Science - 1894
...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...
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Statutory Rules and Orders Other Than Those of a Local, Personal ..., Volume 13

Great Britain - Delegated legislation - 1904
...gentle heat, but the temperature to which the solution is raised should not exceed 30 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...
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Annual Report - National Academy of Sciences

National Academy of Sciences (U.S.) - Academies and institutes - 1883
...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...
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Bulletin of the Bureau of Standards, Volume 1

United States. National Bureau of Standards - Physics - 1904
...the solution is raised should not exceed 30 Ii. 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....
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The Electrical Review, Volume 32

Electric engineering - 1893
...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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