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Electric Tissue

Steep linen or cotton 1 hour in a mixture of 1 part strong sulphuric acid and 3 of pure nitric acid; squeeze out the acid, wash with water until pounds sulphate of alumina cut in thin slices; no sensible acidity remains, plunge it in a and in another similar receptacle 8 pounds weak alkaline solution, then in water, and dry. oleic acid and 6 quarts alcohol. Thoroughly By friction it yields a large quantity of resindissolve the latter compound, and stir it with ous electricity. a wooden stick for 20 minutes, gradually add- 6321. To Make Modeling Clay. ing the sulphate of alumina. Leave the whole for about 24 hours to settle. The oleic acid and the spirit will then be at the surface, and can be decanted; the remaining deposit should be filtered through flannel, and pressed into a Knead dry clay with glycerine instead of water, and a mass is obtained which continues moist and plastic for a length of time, thus removing one of the greatest inconveniences experienced by the modeler. cake. This can be dried by heat, and ground 6322. To Remove Stains from Knives. to a powder. For use on silken or linen The very best way to clean a stained steel clothes, 14 pounds to 20 gallons of water will knife is to cut a solid potato in two, dip one be ample; wool will not require more than 1 of the pieces in brick-dust (such as is usually pound. It is as well to strain these solutions, used for knife-cleaning), and rub the blade. and the fabrics require only to be thoroughly with it. saturated and dried in the air. 6323. To Prevent Ivory Knife Han-