Journal - Franklin Institute of the State of Pennsylvania (1826)
Franklin Institute, Philadelphia, Franklin Institute (Philadelphia, Pa.) · [Philadelphia : Franklin Institute] · leaf 32
place. The stove, with the exception of the lining, is, in preference, con-structed entirely of cast-iron; but the fuel, which is contained in anopen grate, is not in contact with the metal, excepting with that por-tion of it which constitutes the grate bars. The back and ends of thechamber of… … 26 American Patents for June, with Remarks. cylindric shape, while exposed to the pressure of the water. One ofthese tubes communicates with the interior of the helmet, by a pipeopening near the mouth of the diver; this tube is for the supply offresh air, which is thrown in by a forcing pump,…
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