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
91. The Observer very deliberately stooping to put down his Card and
Pencil; with his _left_ Hand grasping the Hoop of the Car, and with his
Right holding a Sand-Bag, to throw over as he approached the Earth;
found that the Balloon was _influenced_ by an +under+ Current blowing
from the Sea: and marked his Progress by the half Mile +white+ Flag;
whose Stretcher having acquired a Position parallel to the Plane of
the Horizon, placed the Flag in an excellent Point of View: the Balloon
_towing_ it _apparently_ with a _slow_ Motion, over the distant Tops of
the _dark-green_ Trees.
CHAPTER XVI.
BALLOON DESCENDING.
[Sidenote: Air chilly. Therm. 55; Barom. 26½.]
Section 92. No sooner had the Balloon _descended_ within the Influence
of the _Sea Breeze_, than it became +instantly+ _condensed_ by a
certain +chilliness+ which +then+ began to prevail.
[Sidenote: Balloon in the _under_ Current.]
93. This Height has _since_ been considered as the +Level+ of +fleecy
Vapour+, +Scud+, or lowest Stratum of Clouds, in +bright+ and +warm+
Weather.[28]
No _visible_ Clouds were presented _near_ the Spectator. On the
contrary, they seemed to _shrink back_ to the Distance of a Mile
round the Eye; and then _immediately_ appear above it, the Balloon
continuing to descend. Nor did any _circular_ Horizon of the Earth shew
itself; till the Balloon had reached below this Level: viz. Barom. 26½,
Thermom. 55. i.e. Temperate.
Prospects were most +extensive+ and beautiful at this Altitude: which
the Barometer estimates at full half a Mile.[29]
Looking again at the Barometer, scarce a Minute afterwards; it had
risen to 27.
[Sidenote: Sudden Effect of cool moist Air on the Balloon.]
94. The Condensation by Chill and Moisture, and quick Contraction of
_its_ Dimensions acted like a _Charm_ on the _Balloon_.
In a Moment; as if dropped from the Clouds, the +Sea+ suddenly
presented itself.[30] It seemed +near+, and of a +red+ Colour.
_Circular_ Landscapes of the _distant_ Countries filled the Eye.
Almost the whole Extent of the Channel was a perfect Calm: and rather
_dazled_ the Sight. But from the Peninsula of Hale to that of Runcorn,
and upwards, a _partial_ +Breeze+ from the North-West _ruffled_ the
Surface (which was there of a _dark_ and menacing Complexion;) and
seemed in its Course to have reached and _influenced_ the Balloon:
whose Descent proving _more_ rapid than was expected; the Sand-Bag tyed
up, weighing 12 Pounds, was opened, and the Sand _dispersed_.
[Sidenote: Ballast thrown down, 12lb. and 12lb.]
95. The Aironaut continuing as before to _stand_ upright in the Car,
and having resumed his Card and Pencil; Thermometer _again_ at 55°,
on finding the Descent not _sufficiently_ retarded, wrote swiftly,
“+no more remarks, mind the ship+:” meaning the Balloon: and briskly
stooping for the second Bag of Sand, weighing likewise 12 Pounds,
_dispersed_ it by _Handfulls_ in the same Manner.
Public-domain text, read in full here on John Shaqi.
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