I think it would be good to have a
renewal of air at bed time, but don't quite know how to manage this.
It was calm all night and when I left the hut at 8.30. At 9 the wind
suddenly rose to 40 m.p.h. and at the same moment the temperature rose
10 deg.. The wind and temperature curves show this sudden simultaneous
change more clearly than usual. The curious circumstance is that
this blow comes out of a clear sky. This will be disturbing to our
theories unless the wind drops again very soon.
The wind fell within an hour almost as suddenly as it had arisen; the
temperature followed, only a little more gradually. One may well wonder
how such a phenomenon is possible. In the middle of a period of placid
calm and out of a clear sky there suddenly rushed upon one this volume
of comparatively warm air; it has come and gone like the whirlwind.
Whence comes it and whither goeth?
Went round the bergs after lunch on ski--splendid surface and quite
a good light.
We are now getting good records with the tide gauge after a great
deal of trouble. Day has given much of his time to the matter,
and after a good deal of discussion has pretty well mastered the
principles. We brought a self-recording instrument from New Zealand,
but this was passed over to Campbell. It has not been an easy matter
to manufacture one for our own use. The wire from the bottom weight
is led through a tube filled with paraffin as in _Discovery_ days,
and kept tight by a counter weight after passage through a block on
a stanchion rising 6 feet above the floe.
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