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Among those of a more pessimistic bent, suspicions that somewhere deep in the bowels of Westminster a press release was being composed urging people not to read anything into this cupric caesura.

Scrub it with cupric nitrate for greenish tones, with ferric for a brownish red.

With spray bottles, they applied both cupric nitrate and ferric nitrate to the metal, then distributed and smoothed the sizzling liquid with mop-shaped brushes.

The copper flowers were no doubt cupric oxide.

It reduces many metallic oxides, such as lead monoxide and cupric oxide, and decomposes water at a red heat.