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Page 126 - ... carbides, the same as those which constitute American petroleum. An almost unlimited diversity in the reaction is here possible, according to the temperature and the bodies present.
Page 128 - ... animals ; the latter is not surprising when we consider that a considerable portion of the tissues of the lower marine animals is destitute of nitrogen, and very similar in chemical composition to the woody fibre of plants.
Page 57 - ... may be easily apprehended. Such a summary may be framed for the present case by assuming that the normal maximum power of the locomotive tested is that which involves a rate of evaporation of 12 pounds of water per square foot of heating surface per hour, and by averaging from the diagrams (figs.
Page 161 - Fah. it is not necessary to try whether it will burn, but merely to collect it in a proper vessel, by which we gain the additional advantage that we may measure the quantity of the vapor, while none of it can be lost by air-currents incidentally passing over the surface of the liquid. He takes, therefore, a glass tube, closed at one end and open at the other, and fills it with the petroleum to be tested ; then closing the open end with the finger, inverts it in a vessel with water warmed to I IO°...
Page 160 - ... hot water, constantly stirring the liquid with the thermometer, frequently noting the temperature, and introducing the test-flame every minute or so. The temperature at which the thin blue flame appears will be the igniting-point of the petroleum, — the point at which it gives off inflammable vapor. To correct this result let the tube gradually cool, introducing the test-flame as before. The lowest temperature at which the vapor takes fire is the true ignitingpoint.