Chemical engineering . r 4 in;-T of constriition. preliminary experiments were made one afternoon and onlylasted for about one hour. The temperature indicated by llu-thermometer in M5 at the end of the experiment was day an experiment was begun in the morning and lasUdfor nearly 9 hours. Voltmeter and ammeter readings weretaken every 15 minutes or oftener. and from these the kilo-watts used and the resistance of the resistor calculated. Theresults are shown in the curves of Fig, 7. where the full-linecurve shows kilowatts and ihc broken-line curve FIG. 5.—FIMS
Chemical engineering . r 4 in;-T of constriition. preliminary experiments were made one afternoon and onlylasted for about one hour. The temperature indicated by llu-thermometer in M5 at the end of the experiment was day an experiment was begun in the morning and lasUdfor nearly 9 hours. Voltmeter and ammeter readings weretaken every 15 minutes or oftener. and from these the kilo-watts used and the resistance of the resistor calculated. Theresults are shown in the curves of Fig, 7. where the full-linecurve shows kilowatts and ihc broken-line curve FIG. 5.—FIMSIIEl) STKlCTlKi: The temperatures are given at various points on the , the figures representing degrees centigrade and tlic wordlead indicating that lead melted at this first the run of the furnace up to hours, it April, 1905.] ELECTROCHEMICAL AND METALLURGICAL INDUSTRY. 137 is found that the mean ordinate of the power curve is , which gives approximately 40 watts per square deci-meter of heating surface. At hours the inside of M5just showed a dull red heat, but the temperature was not Jiighenough to fuse aluminium, introduced by means of the carbonrod. No doubt, in time, aluminium would have fused and thetemperature of the muffles and their contents would havereached at least a good red heat, but, except for special pur-poses, this gradual heating would not be desired. The experi-ment showed that the regulation of temperature was well undercontrol. At hours the voltage at the main terminals was in-creased to no
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectmetallu, bookyear1902
