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The excerpt represents the core issue or deciding factor on which you must meditate, and is drawn from From the Earth to the Moon by Jules Verne: the receiving troughs; and the 1,200 converging trenches carried
the molten metal down to the central well.
The day following that on which the works of the masonry and
boring had been completed, Barbicane set to work upon the
central mould. His object now was to raise within the center of
the well, and with a coincident axis, a cylinder 900 feet high,
and nine feet in diameter, which should exactly fill up the
space reserved for the bore of the Columbiad. This cylinder was
composed of a mixture of clay and sand, with the addition of a
little hay and straw. The space left between the mould and the
masonry was intended to be filled up by the molten metal, which
From the Earth to the Moon |
