The Influence of Magnetism upon the Character of the Spectral Lines

Ch. Fievez
1886 Scientific American  
If now the CO be burned to CO" the·sensible heat produced will be equal to 10,093 X 2 = 20,186 B. t. u. Total, 40,372 B. t. u. But the quantity of heat absorbed in the gasificat.ion of the 2 pounds of carbon has disappeared as heat by its conversion into molecular work; and this is 5,642 X 2 = 11,284 B. t. u. Net for 2 pounds of carbon, 29,088 B. t. u. And for 1 pound of carbon burned to CO". 14,544 B. t. u. The loss of heat attending the formation and release to the air of CO, about 70 per
more » ... . , is serious; but the residuary heat is subject to all the absolute losses at the chimney, by radiation and otherwise, and not more than one-sixth to . one-fifth of the full heating power of the carbon is available. Fortunately, this danger is not as great as it appears. Carbon monoxide can be formed very readily, and its formation can be as readily avoided. It has been de monstrated that only minute traces need ever be form ed in any reasonably well-managed boiler furnace, while dampers are open and the fires are burning freely. While the fires are banked, the proportion of carbon burned to CO is large, although the actual quantity is relatively small. Bituminous coal suffers less loss from this cause than anthracite; on which account it is ad vantageous to use bituminous coal for banking anthra cite fires. A crust is formed, beneath which the escap ing CO is conducted to orifices through which it issues to burn like ordinary jets of gas. But dampers should be made to shut as tight as possible. Combustion cannot be carried on with less than 20 pounds of atmospheric air for each pound of anthra cite, ahd something more for bituminous coal, which usually has as much carbon as anthracitfl has, and 3 or 4 per oent. of hydrogen in addition. The time allowed for combustion, only 3 or 4 seconds, even with exter
doi:10.1038/scientificamerican01301886-8404csupp fatcat:lxsqcv2gvzbr3d5nojngw4w74q