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Scientific American, Vol. 7, No. 3 (October 4, 1851) (1851)

leaf 2

An illustration from Scientific American, Vol. 7, No. 3 (October 4, 1851), 1851, leaf 2
rried round a corner time, but it was not in good working order The blocks of stone are raised ma means of as the building progresses. Having repaired the defect, it was kept burn- Any number of doors and shutters may be ing for two hours, and gave a beautiful light, used, and there can be no doubt… … ter filled withatmospheric air, and kept con- The accompanying engravings represent an cutting as it were the outsides of the used in any post office in the country. Its let- improvement for the purpose set forth in the stantly supplied by apump. From the gaso- groove, @ a, inthe frontand one of…

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