To argue, for instance, that because the lower part of an outward-bound vessel disappears before the mast-head, the water must be round, is to assume that a round surface only can produce such an effect. There is on their part an almost amusing innocence of the fact, than in seeking to explain phenomena by the assumption of rotundity, another assumption is necessarily involved, viz., that nothing else will explain the phenomena in question but the foregone and gratuitous conclusion to which they have committed themselves. "What other explanation can be imagined except the sphericity of the earth?" is the language of Professor de Morgan, and it expresses the state of mind of all who hold that the earth is a globe. IT has already been proved that the astronomers of the Copernican school merely assumed the rotundity of the earth as a doctrine which enabled them to explain certain well-known phenomena.
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EXAMINATION OF THE SO-CALLED "PROOFS" OF THE EARTH'S ROTUNDITY.-WHY A SHIP'S HULL DISAPPEARS BEFORE THE MAST-HEAD.
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Examination of the So-Called ''Proofs'' of the Earth's Rotundity: Why a Ship's Hull Disappears Before the Mast-Head Zetetic Astronomy, Earth Not A Globe: Chapter XIV.