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"With the electric arc, sir," answered the chemist, mopping his brow. This grilling method reminded him of what he had heard of "Third Degree" torments. "That's the best method, sir." "Now in use, anywhere?" "In Notodden, Norway. They have firebrick furnaces, you understand, sir, with an alternating current of 5000 volts between water-cooled copper electrodes.
The same result could be obtained by a pile of red-hot lumps of firebrick, and the same heat obtained also without a trace of flame. It is not possible to enter fully into such a wide and important subject in a single lecture, and the suggestions now given are simply hints for the guidance for those who need or desire to experiment.
If an "expansion" joint were provided, there would be a sufficient length of iron pipe if it passed direct from the junction with the heating apparatus into the stokery. So much of the iron flue as is in the laconicum must be coated with asbestos or some composition, or the heating will not be wholly by firebrick.
Should the bath be heated regularly every day, a firebrick furnace is certainly the best, as such furnaces retain their heat a long time. It should be "banked" at night. A bath only required at times, and quickly, is best heated with a thin iron stove. A portable iron stove and a long length of iron flue will rapidly raise the temperature.
He occupied his own land a rare circumstance among these riverside "crackers;" had a hundred and thirty acres, worth twenty dollars the acre; "jist yon ways," back of the house, in the cliff-side, there was a coal vein two feet thick, as yet only "worked" for his own fuel; and lately, he had struck a bank of firebrick clay which might some day be a "good thing for th' gals."
This heat is now generally applied through the medium of the air, which is raised to a high temperature by being passed over and in contact with the heated surfaces of stoves of various designs, or by direct radiation from hot metal or firebrick. Theoretically, the generally-adopted method of applying the heat to the bather might be greatly improved, but practically it has been found the best.
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