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" ... doubt whether any change in the oxidation of the metal will explain the photogenic effect A series of chromatic changes of a similar character were observed with the oxides of copper, the colours being in like manner regulated by the heat to which... "
Putnam's Home Cyclopedia ... - Page 216
by G.P. Putnam & Co - 1852
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Iron: An Illustrated Weekly Journal for Iron and Steel ..., Volume 51

Perry Fairfax Nursey - Industrial arts - 1849
...observed with the oxides of copper ; the colours being in like manner regulated by the heat to which the glass was exposed. It was found that silver, although...phenomena ; and gold, although usually employed for the parpóse of imparting varieties of red, was found by varying degrees of heating at a high temperature,...
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The Mechanics' Magazine, Museum, Register, Journal, and Gazette, Volume 15

Industrial arts - 1849
...observed with the oxides of copper; the colours being in like manner regulated by the heat to which the glass was exposed. It was found that silver, although with less intensity, exhibited thn same phenomena; and gold, although usually employed for the purpose of imparting varieties of red,...
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Mechanics' Magazine, Volume 51

Technology - 1849
...regelated by the heat to which the glass was exposed. It was found that silver, although with lees intensity, exhibited the same phenomena; and gold, although usually employed for the parpóse of imparting varieties of red, was found by varying degrees of heating at a high temperature,...
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The Chemist: A Monthly Journal of Chemical and Physical Science..., Volume 1

Chemistry - 1850
...by the heat to * British Association. which the glass was exposed. It was found that silver, though with less intensity, exhibited the same phenomena...varieties of red, was found, by varying degrees of heat at a high temperature, and recasting several times to give a great many tints, varying from blue...
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The Chemist: A Monthly Journal of Chemical Philosophy, Volume 1

Chemistry - 1850
...by the heat to * British Association. which the glass was exposed. It was found that silver, though with less intensity, exhibited the same phenomena ; and gold, although usually employed for the purposa of imparting varieties of red, was found, by varying degrees of heat at a high temperature,...
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the chemist; a monthly journal of chemical philosophy and of chemistry ...

john and charles watt - 1850
...like manner regulated by the heat to which the glass was exposed. It was found that silver, though with less intensity, exhibited the same phenomena ; and gold, although usually employed for the purposa of imparting varieties of red, was found, by varying degrees of heat at a high temperature,...
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The Year-book of Facts in Science and Art

Science - 1850
...observed with the oxides of copper ; the colours being in like manner regulated by the heat to which the glass was exposed. It was found that silver, although with less intensity, exhihited the same phenomena ; and gold, although usually employed for the purpose of imparting varieties...
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Hand-book of the Useful Arts: Including Agriculture, Architecture, Domestic ...

Thomas Antisell - Industrial arts - 1852 - 692 pages
...similar character were observed with the oxides of copper; the colors being in like manner regulated by the heat to which glass was exposed. It was found...employed for the purpose of imparting varieties of fed, was found by varying degrees of heating at a high temperature and recasting several times to give...
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Cyclopædia of useful arts & manufactures, ed. by C. Tomlinson. 9 divs, Volume 4

Cyclopaedia - 1852
...regulated by the heat to whieh the glass was exposed. It was found that silver, although with les? intensity, exhibited the same phenomena ; and gold,...purpose of imparting varieties of red, was found, by various degrees of heating at a high temperature, and reeasting several times, to give a great many...
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The Mining Magazine: Devoted to Mines, Mining Operations ..., Volume 7

Mineral industries - 1856
...purple color to the human skin." — Rose. " M. Bontemps says that gold, which is used in glass coloring for the purpose of imparting varieties of red, was...from blue to pink, red, opaque yellow, and green. * * * * Mr. B. is disposed to refer these chromatic changes to some modifications of the composing...
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