ees F.

Such a rise in temperature due to compression is a well-known
phenomenon, referred to as the Foehn effect.

The compression of the atmosphere during the gusts affected the air
temperature so considerably that, coincident with their passage, the
mercury column could often be seen rising and falling through several
degrees. The uniform conditions experienced during steady high winds
were not only expressed by the slight variation in the temperature,
but often in a remarkably even barometric curve. Thus on July 11 the
wind-velocity for twenty-four hours was, throughout, seventy miles per
hour; the temperature remaining within a few degrees of-21 degrees F.,
and the barometric curve did not show as much range as one-twentieth of
an inch.

In attending to the many instruments and in gathering the voluminous
meteorological data, Madigan had his hands very full. Throughout two
years he carried on the work capably and thoroughly. It was difficult to
keep the instruments free from the penetrating snow and in good running
order. The Robinson anemometer was perhaps the greatest source of
worry. Repairs and readjustments were unavoidable, as the instrument
was constantly working at high pressure. In order that these might be
carried out efficiently, the whole apparatus had to be carried down to
the Hut. Here, Bickerton and Correll were continually in consultation
with the meteorologist on the latest breakdown. Cups were blown off
several times, and one was lost and replaced with difficulty. Most
aggravating of all was a habit the clocks developed of stopping during
the colder spells. The old-fashioned method of boiling them was found
of assistance, but it was discovered that the best treatment was to put
them through successive baths of benzene and alcohol.

The most chronic sufferer throughout the vicissitudes of temperature was
the clock belonging to Bage's tide-gauge. Every sleeper in the Hut who
was sensitive to ticking knew and reviled that clock. So often was it
subjected to warm, curative treatment in various resting-places that
it was hunted from pillar to post. A radical operation by Correll--the
insertion of an extra spring--became necessary at last. Correll,
when not engaged designing electroscopes, improving sledge-meters and
perfecting theodolites, was something of a specialist in clocks. His
advice on the subject of refractory time-pieces was freely asked and
cheerfully given. By perseverance and unlimited