Aërial Navigation: A Popular Treatise on the Growth of Air Craft and on Aëronautical MeteorologyZahm, Albert Francis
History
Aërial Navigation: A Popular Treatise on the Growth of Air Craft and on Aëronautical Meteorology
Zahm, Albert Francis
Aeronautics; Meteorology
“Mr. Coxwell told me that whilst in the ring he felt it
piercingly cold; that hoar-frost was all round the neck of the
balloon. On attempting to leave the ring he found his hands
frozen, and he had to place his arms on the ring and drop
down; that he thought for a moment I had laid back to rest
myself; that he spoke to me without eliciting a reply; that
he then noticed my legs projected and my arms hung down by my
side; that my countenance was serene and placid, without the
earnestness and anxiety he had noticed before going into the
ring, and then it struck him I was insensible. He wished to
approach me, but could not, and he felt insensibility coming
over himself; that he became anxious to open the valve, but in
consequence of having lost the use of his hands he could not,
and ultimately did so by seizing the cord with his teeth and
dipping his head two or three times until the balloon took a
decided turn downwards. This act is quite characteristic of
Mr. Coxwell. I have never yet seen him without a ready means
of meeting every difficulty, as it has arisen, with a cool
self-possession that has always left my mind perfectly easy,
and given me every confidence in his judgment in the management
of so large a balloon.
“No inconvenience followed the insensibility; and when we
dropped it was in a country where no conveyance of any kind
could be obtained, so that I had to walk between seven or eight
miles.
“The descent was at first very rapid; we passed downwards three
miles in nine minutes; the balloon’s career was then checked,
and we finally descended in the center of a large grass-field
belonging to Mr. Kersall, at Cold Weston, seven-and-a-half
miles from Ludlow.
“I have already said that my last observation was made at
a height of 29,000 feet; at this time (1 h. 45 m.) we were
ascending at the rate of 1,000 feet per minute; and when I
resumed observations we were descending at the rate of 2,000
feet per minute. These two positions must be connected, taking
into account the interval of time between, viz. 13 minutes,
and on those considerations the balloon must have attained
the altitude of 36,000 or 37,000 feet. Again, a very delicate
minimum thermometer read—12, and this would give a height of
37,000 feet. Mr. Coxwell, on coming from the ring, noticed that
the center of the aneroid barometer, its blue hand, and a rope
attached to the car, were all in the same straight line, and
this gave a reading of 7 inches, and leads to the same result.
Therefore these independent means all lead to about the same
elevation, viz. fully SEVEN MILES.
Public-domain text, read in full here on John Shaqi.
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