Airopaidia : $b Containing the narrative of a balloon excursion from Chester, the eighth of September, 1785, taken from minutes made during the voyage; hints on the improvement of balloons ... To which is subjoined, mensuration of heights by the barometer, made plain; with extensive tables. The whole serving as an introduction to aërial navigation. — John Shaqi
Airopaidia : $b Containing the narrative of a balloon excursion from Chester, the eighth of September, 1785, taken from minutes made during the voyage; hints on the improvement of balloons ... To which is subjoined, mensuration of heights by the barometer, made plain; with extensive tables. The whole serving as an introduction to aërial navigation.Baldwin, Thomas
History
Airopaidia : $b Containing the narrative of a balloon excursion from Chester, the eighth of September, 1785, taken from minutes made during the voyage; hints on the improvement of balloons ... To which is subjoined, mensuration of heights by the barometer, made plain; with extensive tables. The whole serving as an introduction to aërial navigation.
Baldwin, Thomas
Aeronautics -- Early works to 1900; Balloons -- Early works to 1800
132. In Consequence of having _held tight_ the Neck of the Balloon, the
Gass _within_ began _again_ to expand, and the Machine became _more
bloated_ than when _stationary_ at the first Ascent: the Bottom of the
Balloon being drawn up to the Height of his Hand, when the Arm was
stretched, and himself on Tip-toe.
[Sidenote: The Valve first tried.]
133. Tho’ the late Descent, at the last +Opening+ of the Balloon, had
been rapid; which was known _chiefly_ by the Want of Reaction from
the Bottom of the Car against the Soles of the Feet; yet being still
_far above all_ Clouds; fearless of the _Currents_, _Rocks_, and
_Shoals_, to which +all maritime+ _Navigation_ is subject; he took the
Opportunity of trying the upper Valve; _purposely_ to know the Effect.
So retaining the Bottom of the Balloon in his _right_ Hand, he drew
the Valve Cord with his _left_.
Immediately he heard it _click_: which proved that it was quite open,
and in good Order.
[Sidenote: The Valve answered.]
134. He tried the Valve three Times _smartly_, and deliberately.
The Escape of the inflammable Air or Gass was like the _growling_ Sound
made in a Mill by the Grinding of the Mill-stones, but by no Means so
loud.
CHAPTER XXV.
THIRD BALLOON-IRIS
[Sidenote: Balloon-shadow.]
Section 135. The _successive_ Operations of untying the Neck, and
_repeated_ Trials of the Valve, brought the Observer so low, that he
coud trace the _Image_ of the Balloon on the _upper_ Surface of _light
silvery_ Clouds beneath him.
[Sidenote: Third Balloon-Iris.]
[Sidenote: Iris remained.]
[Sidenote: The Earth disappeared.]
136. _Iris_, a bright _celestial_ Nymph, his _former_ Attendant, deck’d
in gay Attire as usual for the Bow, made her _third_ Appearance:
instantly _encircling_ the Balloon. Nor was her Stay so short as
before; as if to _recompense_ the Aironaut for the lost Sight of Earth
and all _terrestrial_ Objects, which then began to _disappear_.
137. In less than _a Minute_ after the _Deflation_; the Neck of the
Balloon continuing to be held tight in the Hand; the Balloon _quickly_
encreased in Bulk, and soared _aloft_, as before.
[Sidenote: Balloon alternately rising and falling.]
138. It continued _rising_ as long as the Hand coud _reach_ to hold the
Neck _tight_: and, on loosing it _an Instant_, made a rapid Descent: on
Account of the _Gass_ which escaped, and of the atmospheric _Air_ which
rushed in by the _same_ Opening at the Bottom.
[Sidenote: The Play of _fast_ and _loose_ repeated.]
139. The alternate Play of +fast and loose+, was frequently and
_successfully_ repeated: the Balloon always rising till it swelled out
of the Reach of the Hand: at which Time it was let go: and the Neck
(as well as the Balloon) descending; was _presently_ caught in the
Hand, and made _Air-tight_ as before.
[Sidenote: Manouvres seen at the Distance of 15 Miles.]
Public-domain text, read in full here on John Shaqi.
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