Moby Dick

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Regarding the Sperm Whale's head as a solid oblong, you may, on an
inclined plane, sideways divide it into two quoins,* whereof the lower
is the bony structure, forming the cranium and jaws, and the upper an
unctuous mass wholly free from bones; its broad forward end forming the
expanded vertical apparent forehead of the whale. At the middle of the
forehead horizontally subdivide this upper quoin, and then you have two
almost equal parts, which before were naturally divided by an internal
wall of a thick tendinous substance.


*Quoin is not a Euclidean term. It belongs to the pure nautical
mathematics. I know not that it has been defined before. A quoin is a
solid which differs from a wedge in having its sharp end formed by the
steep inclination of one side, instead of the mutual tapering of both
sides.