. Journal of electricity. nalysis will be foundto be nitrogen and oxygen. Since 1 24 JOURNAL OF ELECTRICITY I;Vol. XL —No. 1 unit by volume of oxygen forms 1 unit by volume ofcarbon dioxide in the burning of pure carbon the actualpercentage of nitrogen in the chimney gases is notaltered but should remain if perfect combus-tion is maintained. On the other hand, when imperfect combustion isunder way, or in other words, when some carbonmonoxide is being formed, 1 unit by volume of oxy-gen forms 2 units by volume of carbon when pure carbon is the fuel, the sum
. Journal of electricity. nalysis will be foundto be nitrogen and oxygen. Since 1 24 JOURNAL OF ELECTRICITY I;Vol. XL —No. 1 unit by volume of oxygen forms 1 unit by volume ofcarbon dioxide in the burning of pure carbon the actualpercentage of nitrogen in the chimney gases is notaltered but should remain if perfect combus-tion is maintained. On the other hand, when imperfect combustion isunder way, or in other words, when some carbonmonoxide is being formed, 1 unit by volume of oxy-gen forms 2 units by volume of carbon when pure carbon is the fuel, the sum of thepercentages of carbon dioxide, oxygen, and >4 thecarbon monoxide must be in the same ratio to thenitrogen present as the oxygen in the air is to thenitrogen component, namely as : This isa convenient check upon a flue gas analysis in theprogress of the experiment. Thus if an analysis ofchimney gas is found to contain by volume car- TO BOILER ROOM INDICATOR TO RECORDING GAUGE ABSORPTION CHAMBER. WATERJAR FILTER GAS INLET A RECORDER FOR COMBUSTION OPERATIONFrom the discussion in the text it may be inferred that a knowl-edge of the carbon dioxide component of the flue gas enables usto judge concerning the combustion taking place in the principle involved in the type of carbon dioxide recorder asshown is that a change of volume in a gas produces a change ofpressure. A continuous sample of the flue gas enters at A andin passing through C the carbon dioxide component is absorbed andconsequently a reduction in pressure takes place. By the calibra-tion of suitable manometer tubes the instrument may be made toread the carbon dioxide component direct. bon dioxide, carbon monoxide, oxygen,and nitrogen, according to this proportion, weshould have + -\ : = : 2 Upon investigation this will be found to be approxi-mately true and well within the limit of experimentalaccuracy. As California crude oil contain
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