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by which the mass of the whole earth exceeds that
of our suppositious mass of ice and snow.
I state this because estimates of the effects of
such an ice-cap upon the sea level have been made,
based merely upon the displacement of the earth’s
centre of gravity. This appears to me to be
inadequate and fallacious.
The Dovrefjeld is a large undulating
tableland, highest near its middle portion, slightly and
irregularly sloping on all sides towards the
numerous outlet valleys, which radiate in nearly all
directions, and form long gullies or notches of much
steej^er slope than that of the fjeld itself. It is
also surrounded by mountains, many of them
considerably higher than its highest portion
(Sne-haetten rises 3500 feet above the middle of the
plateau), the radiating valleys of course lying
between these mountains.
The magnitude of Forbes’s difficulty will be
easily understood on reflecting upon these
conditions. Unless the glacial epoch is altogether a
myth, this plateau, about 4000 feet above the sea,
and between 62° and 63° north latitude, must
have been a great sneefond or neve, a reservoir
of snow and ice supplied by the accumulating
snowfall upon itself, plus all the avalanches and
creeping overflow of snow from the surrounding
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