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
In an erect Posture, and with the utmost Composure he gazed around:
reflecting with Wonder and Delight on a Situation, where the
+Beautiful+ and +Sublime+ were seen united, in a Manner perfectly novel
and engaging.
[Sidenote: Novel situation illustrated by a familiar Comparison.]
If it be allowed, for the Sake of Illustration, to compare _great_
Things with _small_; he found himself suspended in the central Concave
of an unmeasurable Crater Bowl or Bason; and considerably above the
Rim or Margin, so as to peep fairly over it: for by looking _straight
before him_, while the Balloon continued gently turning on its vertical
Axis, he coud see quite round into the +Blue+.
The Earth was the _Miniature-Picture_[14] painted on the Bottom of the
Bowl, on the Inside. The Sides of the Bowl next the Bottom were rather
obscure: as the Objects, on the Surface of the Earth not immediately
under the Eye, being foreshortened, were indistinct, either on Account
of their immense Distance, or by mere Accumulation of Vapours, and
mixed with Haze and Cloudiness.
[Sidenote: The Comparison carried on.]
From thence to the Top of the Bowl, was fantastically grouped, spotted,
and dash’d with Clouds dense and luminous, in the strangest and most
grotesque Forms; still smaller and more numerous, as the Eye was more
extended: The Rim or Margin ending, not in a fringed Border; but in
a plain smooth Line; to represent the amazing Distance, at which,
the upper Surfaces of _Clouds in Perspective_ lost all their rugged
mountainous and fringed Shapes; and terminated even and smooth: making
a perfect horizontal Ring in the Heavens, somewhat below the Eye of the
Observer. The whole formed a glorious _Concave_: and the Imagination
was lost in the surrounding distant Azure.[15]
[Sidenote: _Apparent_ Altitude of the Balloon when stationary.]
[Sidenote: The _apparent_ Heights proportioned to the _barometric_
Height.]
49. Considering more attentively the Dimensions of this vast
Amphitheatre; as he long continued _apparently_ in the _same_ Spot,
and seemed to himself a mere Atom floating _invariably_ in the Center
of the empty Space; yet as a sole thinking Being there, whose Mind
was bent on estimating the Extent of his View, so accurately defined
by the circular Horizon of dense accumulated Vapour; and judging, as
of other Distances, by _the natural Eye_ alone; pointing downwards on
Objects which were only distinguishable when immediately below it,
frequently no more than the Circuit of a Mile on the Earth’s Surface,
the _vertical Boundary_ of the profound Abyss; all else being obscured
by Haze, or removed from Sight by Volumes of intervening Cloud; he coud
not divest himself of the Idea, but that the _apparent_ Depth below him
was at least _seven_ Miles: _three_ from the Earth to the upper Surface
of the superior Clouds,[16] and _four_ above them.[17]
OBJECTION REMOVED.
Public-domain text, read in full here on John Shaqi.
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