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Then there is Dode's process for platinising glass, by which a reflecting mirror is produced without silvering or otherwise coating its back, by first applying a thin coating of platinic choride mixed with an oil to the surface of the glass and heating the same, by which the mirror reflects from its front face.

Platinic worth of his approximate 240 Ibs.: $300,000-$1,900,000 less than the 243� Ibs. in diamonds he got in 1946.

Double salts of cerous chloride with stannic chloride, mercuric chloride, and platinic chloride are also known.

They give a characteristic pale red precipitate with sodium pyrophosphate, soluble in an excess of the precipitant; they also form precipitates on the addition of platinic chloride and potassium ferrocyanide.

They are soluble in water and give characteristic precipitates with platinic and auric chlorides, and with potassium ferrocyanide.