w, the sky above being perfectly cloudless, and of an intense
Prussian blue.
By this time Mr. Glaisher had received his first surprise, as imparted
by the record of his instruments. At starting, the temperature of the
air had stood at 59 degrees. Then at 4,000 feet this was reduced to 45
degrees; and, further, to 26 degrees at 10,000 feet, when it remained
stationary through an ascent of 3,000 feet more, during which period
both travellers added to their clothing, anticipating much accession of
cold. However, at 15,500 feet the temperature had actually risen to 31
degrees, increasing to no less than 42 degrees at 19,500 feet.
Astonishing as this discovery was, it was not the end of the wonder,
for two minutes later, on somewhat descending, the temperature commenced
decreasing so rapidly as to show a fall of 27 degrees in 26 minutes.
As to personal experiences, Mr. Glaisher should be left to tell his
own story. "At the height of 18,844 feet 18 vibrations of a horizontal
magnet occupied 26.8 seconds, and at the same height my pulse beat at
the rate of 100 pulsations per minute. At 19,415 feet palpitation of
the heart became perceptible, the beating of the chronometer seemed
very loud, and my breathing became affected. At 19,435 feet my pulse had
accelerated, and it was with increasing difficulty that I could read
the instruments; the palpitation of the heart was very perceptible; the
hands and lips assumed a dark bluish colour, but not the face. At 20,238
feet 28 vibrations of a horizontal magnet occupied 43 seconds. At 21,792
feet I experienced a feeling analogous to sea-sickness, though there was
neither pitching nor rolling in the balloon, and through this illness I
was unable to watch the instrument long enough to lower the temperature
to get a deposit of dew. The sky at this elevation was of a very
deep blue colour, and the clouds were far below us. At 22,357 feet I
endeavoured to make the magnet vibrate, but could not; it moved through
arcs of about 20 degrees, and then settled suddenly.
"Our descent began a little after 11 a.m., Mr. Coxwell experiencing
considerable uneasiness at our too close vicinity to the Wash. We came
down quickly from a height of 16,300 feet to one of 12,400 feet in one
minute; at this elevation we entered into a dense cloud which proved to
be no less than 8,000 feet in thickness and whilst passing through this
the balloon was invisible from the car. From the rapidity of the descent
the
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