CHAP. 85.—PROGNOSTICS DERIVED FROM WATER.
There are certain prognostics, too, that may be derived from
water. If, when the sea is calm, the water ripples in the harbour,
with a hollow, murmuring noise, it is a sign of wind,
and if in winter, of rain as well. If the coasts and shores reecho while the sea is calm, a violent tempest may be expected;
and the same when the sea, though calm, is heard to roar, or
throws up foam and bubbling spray. If sea pulmones1
to be seen floating on the surface, they are portentous of stormy
weather for many days to come. Very frequently, too, the sea
is seen to swell in silence, and more so than when ruffled by an
ordinary breeze; this is an indication that the winds are at
work within its bosom already.