The meteograph, with the anemograph,
cost L600, but the great advantage is that no assistant is required to
sit up at night, and that all the figures wanted for climatic
constants are ready tabulated without any further labor.
But the Institute is most justly celebrated for the researches on the
motion and heights of clouds that have been carried on of late years
under the guidance of Prof. Hildebrandsson, with the assistance of
Messrs. Ekholm and Hagstroem.
The first studies were on the motion of clouds round cyclones and
anticyclones; but the results are now so well known that we need not
do more than mention them here.
Latterly the far more difficult subjects of cloud heights and cloud
velocities have been taken up, and as the methods employed and the
results that have been obtained are both novel and important, we will
describe what we saw there.
We should remark, in the first instance, that the motion of the higher
atmosphere is far better studied by clouds than by observations on
mountain tops, for on the latter the results are always more or less
influenced by the local effect of the mountain in deflecting the wind
and forcing it upward.
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