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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1902 Excerpt: ... has been only partially used, and the air contained in the kiln is therefore warmer and lighter than that of the free atmosphere. Therefore, if any adjustment between the specifically lighter air on the inside of the kiln, and that of the outside takes place directly, then an upward movement will result in the kiln. But if an adjustment is effected with the still wanner air of the chimney of the continuous kiln, then the "natural way," which the air would take, would be from above to below. In the first case, the air must have retained a certain amount of heat, in the second the movement becomes the more pronounced, the more its heat is withdrawn and the greater the temperature difference between the air along the kiln floor and that in the chimney, whose draft is produced by some other source of heat. Just as in a vertical tube an upward current of air will be produced by heating the air column in comparison with the outside atmosphere, so a descending current will be produced by a cooling of the same; thus there arises an inverted chimney of the height of the kiln chamber to assist the operation of the kiln stack, if a stream of warm air is introduced under the arch during the water-smoking, its free heat being absorbed. In no case, as long as the temperature of the water evaporating in the water-smoking compartment is below 100o, can a separation of the water vapor from the air in which the vapors were generated, take place; hence the water vapor has no opportunity to escape alone, nor in a greater degree, out of the upper openings of the kiln, than the air volume that is necessary to hold it in solution, which corresponds to the temperature governing the ability of the air to take up aqueous vapors. Investigations have shown that gases, which...
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