Or Ferricyanide Of Iron Is Formed By Adding The Red Prussiate Of





potash to a protosalt of iron. This blue is lighter and more delicate

than ordinary Prussian blue, and is believed to resist the action of

alkalies longer. It is a question whether the common Prussian blue

obtained by oxidizing the precipitate yielded by green vitriol and the

yellow prussiate is not in reality this variety. However that may be,

there is, as far as permanence goes, little or no difference between the

two kinds.





TTITLE ULTRAMARINES.



ARTIFICIAL ULTRAMARINES





Or Coeruleum Under The Name Coelin There Has Of Late Years Been Or Field's Carmine Like That Of Cochineal Is The Richest And Deepest facebooktwittergoogle_plusredditpinterestlinkedinmail

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