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Aluminized Charcoal (This is recommended by Dr)

This is recommended by Dr. Stenhouse as a cheap and very efficient decolorizing agent. Disabove and below the shelf, the upper ends projecting at least 1½ inches below the top cover, E, and the other ends penetrating the contents of the generator. C is a horizontal row of holes at about 18 inches from the botsolve in water 54 parts of the sulphate of tom of the generator, equidistant, and 1/2 an alumina of commerce, and mix with 924 parts inch in diameter, bored in about every other finely powdered wood charcoal. When the stave, and in a vertical or slanting direction charcoal is saturated, cvaporate to dryness, from the outside downward inside. There is and heat to redness in covered Hessian cruci- also a hole for the insertion of the thermomebles till the water and acid are dissipated. ter, 6 inches below the false top; this hole The charcoal contains just 7½ per cent. of should slant from the outside, downward inanhydrous alumina. side. The holes are bored in this manner to