"
It is scarcely necessary to remark that it is impossible that
the diminution of atmospheric pressure, due to an elevation
of 6250 feet (1905 meters) above the sea-level, could sensibly
affect the density of the water. In fact, the coefficient of
compressibility of this liquid is so small that the withdrawal
of the above indicated amount of pressure (about one-fifth
of an atmosphere) would not lower its density more than one
hundred-thousandth part! The truth is, that the specific
gravity is not lower than that of any other fresh water of
equal purity and corresponding temperature. It is not less
buoyant nor more difficult to swim in than any other fresh
water; and consequently the fact that the bodies of the
drowned do not rise to the surface cannot be accounted for by
ascribing marvelous properties to its waters.
The distribution of temperature with depth affords a natural
and satisfactory explanation of the phenomenon, and renders
entirely superfluous any assumption of extraordinary lightness
in the water. The true reason why the bodies of the drowned
do not rise to the surface is evidently owing to the fact that
when they sink into water which is only 4 deg.
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