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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: a kind of circle strongly bolted together, and of immense strength.
The center of this wooden disc was hollowed out to a diameter
equal to the exterior diameter of the Columbiad. Upon this wheel
rested the first layers of the masonry, the stones of which were
bound together by hydraulic cement, with irresistible tenacity.
The workmen, after laying the stones from the circumference to
the center, were thus enclosed within a kind of well twenty-one
feet in diameter. When this work was accomplished, the miners
resumed their picks and cut away the rock from underneath the wheel
itself, taking care to support it as they advanced upon blocks of
great thickness. At every two feet which the hole gained in depth
From the Earth to the Moon |
