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" ... 2. On repeating this simple experiment, I find that it is necessary for the production of a good effect to use dissimilar metals ; for instance, a piece of gold or platina on a plate of copper or of silver will make a very decided image, whereas copper... "
The Mechanic's Magazine, Museum, Register, Journal and Gazette - Seite 468
1842
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Iron: An Illustrated Weekly Journal for Iron and Steel ..., Band 37

Perry Fairfax Nursey - 1842
...it, and the surface be breathed over once, the object being then carefully removed, as often as you breathe again on the surface, a spectral image of...unequally. 2. On repeating this simple experiment, I And that it ia necessary for the production of a good effect, to use dissimilar metals; for instance,...
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The Chemist, Band 4

1843
...this singular phenomenon may be exhibited for many days after the first trial is made." Several other similar experiments are mentioned, all of them going...the metallic surface, which occasions it to condense vapors unequally. 2. On repeating this simple experiment, I ñnd that it is necessary for the production...
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Journal of the Franklin Institute

Franklin Institute (Philadelphia, Pa.) - 1843
...this singular phenomenon may be exhibited for many days after the first trial is made." Several other similar experiments are mentioned, all of them going...the metallic surface, which occasions it to condense vapors unequally 2. On repeating this simple experiment, I find that it is necessary, for the production...
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Encyclopædia metropolitana; or, System of universal knowledge, Band 16

Encyclopaedia - 1851
...seen, and this phenomenon may be exhibited for many days after the first trial is made." Several other similar experiments are mentioned, all of them going...platina on a plate of copper or of silver will make a very decided image, whereas copper or silver on their respective plates gives but a very faint one,...
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Photography: A Treatise on the Chemical Changes Produced by Solar Radiation ...

Robert Hunt - 1852 - 290 Seiten
...seen, and this phenomenon may be exhibited for many days after the first trial is made." Several other similar experiments are mentioned, all of them going...platina on a plate of copper or of silver will make a very decided image, whereas copper or silver on their respective plates gives but a very faint one,...
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A Manual of Photography

Robert Hunt - 1852 - 321 Seiten
...seen, and this phenomenon may be exhibited for many days after the first trial is made." Several other similar experiments are mentioned, all of them going...platina on a plate of copper or of silver will make a very decided image, whereas copper or silver on their respective plates gives but a very faint one,...
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Photography

Robert Hunt - 1853 - 329 Seiten
...and"^ this phenomenon may be exhibited for many days after the first trial is made." Several other similar experiments are mentioned, all of them going...the production of a good effect to use dissimilar inetals ; for instance, a piece of gold or platina on a plate of copper or of silver will make a very...
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Researches on Light in Its Chemical Relations: Embracing a Consideration of ...

Robert Hunt - 1854 - 396 Seiten
...the simple experiments above referred to, of placing a disc upon a metal plate and breathing on it, I find that it is necessary for the production of...platina, on a plate of copper or of silver, will make a very decided image, whereas copper or silver, on their respective plates, give but a very faint one,...
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Researches on Light in Its Chemical Relations: Embracing a Consideration of ...

Robert Hunt - 1854 - 396 Seiten
...the simple experiments above referred to, of placing a disc upon a metal plate and breathing on it, 1 find that it is necessary for the production of a...platina, on a plate of copper or of silver, will make a very decided image, whereas copper or silver, on their respective plates, give but a very faint one,...
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New views of matter, life, motion, and resistance: also an enquiry into the ...

Joseph Hands - 1879 - 538 Seiten
...repeating some of the foregoing experiments of placing a disc upon a metal plate and breathing thereon, it is necessary, for the production of a good effect, to use dissimilar metals, thus setting up Meloni's galvanic action. For instance, a piece of gold or platinum placed on a plate...
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