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Sheldon, as a man of the world, was to transfer his failure to somebody else, with more or less profit to himself. To this end he preserved the spotless purity of his muslin curtains, though the starch that stiffened them and the bleaching-powder that whitened them were bought with money for which he was to pay sixty per cent.

Spray that something over the parapet, and if you can spray it far enough and wide enough you may precipitate the deadly green and brown mists into chlorides or bromides which will be as harmless as bleaching-powder and not less salubrious. Others have turned their attention to automatic flares.

Silk dissolves completely in hot basic zinc chloride solution, and also in an alkaline solution of copper and glycerin, which solutions do not dissolve vegetable fibres or wool. Chlorine and bleaching-powder solutions soon attack and destroy silk, and so another and milder agent, namely, sulphurous acid, is used to bleach this fibre.

A solution of bleaching-powder gives with solution of the sulphate a purple colour changing to red-brown. Symptoms. Nausea, vomiting, giddiness, intoxication, drowsiness, gasping for breath, feeble pulse, and marked cyanosis. In its industrial use it may act as a poison either by inhalation of the fumes or by absorption through the skin.