396 Rogers’s Account of two Remarkable 
the waterspout, or whirlwind, is manifested, also, in those in- 
stances of the sudden showers of fishes from the upper air, of 
the occurrence of which, in India and elsewhere, we have the 
most incontestable evidence ; and it is strikingly exemplified 
in the results of one at Olziitiidnde, which so nearly emptied 
the harbor that the greater part of the bottom was uncovered. 
The learned Professor CErsted, of Copenhagen, who states 
this latter fact in a paper in Jameson's Edinburgh Journal, 
adduces several instances to prove the great distances to which 
waterspouts have transported the largest objects. He attri- 
butes the upward tendency of the air, in the interior of the 
whirl, to the resistance which the rotating particles encounter 
at the circumference, forcing them into the only direction in 
which they can yield to the pressure, namely, upwards." 
Keeping in view, then, the true mode of action, and prodi- 
glous power of the whirling current, and the enormous Mo- 
mentum of the impinging ice, we may arrive, we think, at^a 
satisfactory solution of all the phenomena of these boulder 
trains. In the first place, the velocity of that portion of the 
northern flood which swept across the Berkshire hills must 
have been excessively great. Coming from the north-west, 
from the elevated region of the Adirondack, the current must 
have been greatly accelerated by pouring down from a height 
A more accurate explanation of the lifting action of the whirl yr be that, W 
e Vi 
think, — Mead ascribe it to the diminished molecular tension in part 
aused by the ce effort of the particles to press awa way from 
ru line, or, in bá words, by the centrifugal force due to their rotation. d 
diminished vein on, though not bom of a sensible rarefaction © of the RUF 
such as would happen were t T O ng column air, will still, as it would 
gated from above. T: subjacent fluid, urged upwards by the undimin! 
therefore predominating, pressure of the remoter and comparatively quiescen 
will be con Mae to rise along the axis of the whirl, very much as air a 
along the heated flue of a chimney, but, uniting to this pini motion the acq 
revolving one, it will, necessarily, move in a regular asce ascending wu 
moreover, of the progressive reduction of the lateral pressure towa 
the particles of liquid rise, their gyrations will continually widen, $0 as 5 to A 
conical, or more nearly a ma figure ied if the ary ot winter is sion vhi 
of the ‘time E “37 4 unnel-s 
path particles will b d depression 
will form at the surface. 
Te 
