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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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Telegraphy: A Detailed Exposition of the Telegraph System of the British ...

Thomas Ernest Herbert - Telegraph - 1906 - 912 pages
...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...which the solution is raised should not exceed 30 0. Mercurous sulphate treated as described in 3 should be added in the proportion of about 12 per cent,...
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Outlines of the Evolution of Weights and Measures and the Metric System

William Hallock, Herbert Treadwell Wade - Metric system - 1906 - 304 pages
...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...but the temperature to which the solution is raised must not exceed 30 C. Mercurous sulphate, treated as described in 3, shall be added in the proportion...
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Laboratory Work in Electrical Engineering (preliminary Grade): A Series of ...

John Roberts (Electrical engineer.) - Electric engineering - 1906 - 218 pages
...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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Outlines of the Evolution of Weights and Measures and the Metric System

William Hallock, Herbert Treadwell Wade - Metric system - 1906 - 304 pages
...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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Telegraphy: A Detailed Exposition of the Telegraph System of the British ...

Thomas Ernest Herbert - Telegraph - 1906 - 912 pages
...water with nearly twice its weight of crystals of [Mire 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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A Handbook of Electrical Testing

Harry Robert Kempe - Electric measurements - 1908 - 706 pages
...30C C. Mercuruus sulphate treated as described in (;() 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 slock bottle. Crystals should...
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Outlines of Electrical Engineering

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

Carl Hering - 1910
...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. (See notes below.) The crystals should be dissolved with the aid of gentle...
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Electrical Engineer's Pocket-book

Horatio Alvah Foster - Electric engineering - 1913 - 1614 pages
...weight of the zinc sulphate crystals to neutralize any free acid. The crystals should be dissolved by ich о b ց "P 1913 D. Van Nostrand company"/ Fo must not exceed 30 C. Mercurous sulphate, treated as described in 3, shall be added in the proportion...
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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
...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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