 | Francis Beatus Badt - 1889 - 132 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.... | |
 | F.B. Badt - 1893 - 126 sider
...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... | |
 | 1901 - 628 sider
...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... | |
 | International Correspondence Schools - 1901 - 632 sider
...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... | |
 | International Correspondence Schools - 1901 - 1106 sider
...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... | |
 | Arthur Vaughan Abbott - 1904 - 506 sider
...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... | |
 | International Correspondence Schools - 1905 - 760 sider
...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... | |
 | Henry Charles Horstmann, Victor Hugo Tousley - 1908 - 352 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 the blue vitriol is shown by the fading of the blue color, which should be kept as high as... | |
 | 1900 - 300 sider
...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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... 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. 