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Lilac (Dissolve crude oxide of light)

Dissolve crude oxide of light; as any addition of water after filtra- cobalt in nitric or muriatic (hydrochloric) tion, to make up the deficiency, tends to acid; add sesquicarbonate of ammonia, in exweaken the color and detract from its bright-cess; afterwards sufficient ammonio-sulphate ness. Druggists' show-bottles are now made of copper to produce the color required. of colored glass, and filled with pure water. Filter. (See No. 2648.) These are just as effective as the white glass bottles filled with colored waters, and obviously involve much less trouble.