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Bøker Bok 19 av 9... the zinc. The need of the blue vitriol is shown by the fading of the blue color,...
" ... the zinc. The need of the blue vitriol is shown by the fading of the blue color, which should be kept at least as high as the top of. the copper, but it should never reach the zinc. "
Regulations for the Operation and Maintenance of United States Military ... - Side 13
av United States. Army. Signal Corps - 1899 - 160 sider
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Bell Hangers' Hand-book

Francis Beatus Badt - 1889 - 105 sider
...the liquid four or five ounces of pulverized sulphate of zinc. Blue vitriol should be dropped into the jar as it is consumed, care being taken that it goes to the bottom. The need of blue vitriol is shown by the fading of the blue FIG. 15.—GRAVITY BATTERY—CROWFOOT TYPE....
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Bell Hangers' Hand-Book

F.B. Badt - 1893
...use, and pouring it into the jar; or, when this cannot be done, by Blue vitriol should be dropped into the jar as it is consumed, care being taken that it goes to the bottom. Trie need of blue vitriol is shown by the fading of the blue FIG. 15.—GRAVITY BATTERY—CROWFOOT...
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International library of technology: a series of textbooks for ..., Volum 23

International Textbook Company - 1901
...before it will be in good condition. 118. Caring for Cells. — Blue vitriol should be dropped into the jar as it is consumed, care being taken that it goes to the bottom and not on the zinc. The need of the blue vitriol is shown by the fading of the blue color, which should...
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Telegraphy, Volum 23

International Correspondence Schools - 1901
...before it will be in good condition. 118. Caring for Cells. — Blue vitriol should be dropped into the jar as it is consumed, care being taken that it goes to the bottom and not on the zinc. The need of the blue vitriol is shown by the fading of the blue color, which should...
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Elements of telegraph operating, telegraphy

International Correspondence Schools - 1901
...of this black deposit, remove the zinc and brush or scrape it off. Biuestone should be dropped into the jar as it is consumed, care being taken that it goes to the bottom and that none of it lodges upon the zinc. The need of bluestone is shown by the fading of the blue...
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The substation

Arthur Vaughan Abbott - 1904
...into the water four or five ounces of pulverized sulphate of zinc. Blue vitriol should be dropped into the jar as it is consumed, care being taken that it goes to the bottom. The need of the blue vitriol is shown by the fading of the blue color, which should be kept as high as...
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Electricity and Magnetism: Electrodynamics. Electrical Resistance and ...

International Correspondence Schools - 1905
...before it will be in good condition. 29. Caring for Cells. — Blue vitriol should be dropped into the jar as it is consumed, care being taken that it goes to the bottom and not on the zinc. The need of the blue vitriol is shown by the fading of the blue color, which should...
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Modern electrical construction...

Henry Charles Horstmann, Victor Hugo Tousley - 1908
...the liquid four or five ounces of pulverized sulphate of zinc. Blue vitriol should be dropped into the jar as it is consumed, care being taken that it goes to the bottom. The need of the blue vitriol is shown by the fading of the blue color, which should be kept as high as...
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Telephone Magazine: An Illustrated Monthly Magazine, Volum 16

Fred B. De Land, John C. McMynn, Frederic Auten Combs Perrine, Carl E. Kammeyer - 1900
...which must be pulverized so that it will dissolve immediately. Blue vitriol should be dropped into the jar, as it is consumed, care being taken that it goes to the bottom. The need of the blue vitriol is shown by the fading of the blue color, which should be kept as high as...
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