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
65. The Pepper Salt and Ginger were tasted, and found to retain their
usual Pungency: contrary to what Travellers have reported to happen on
the Peak of Teneriffe.
[Sidenote: Silk electric.]
The small Hank of yellow raw Silk tyed to the upper Hoop, and hanging
down from it, appeared _rough_, as if electric: and, tho’ drawn thro’
the Hand, continued _furred_ as before.
[Sidenote: _White_ Flag wholly hung out from the Car.]
66. It was now thought a proper Time to finish the original Work of
unwinding the remaining Part of the half Mile of Twine: which proved
equally tedious, as at the first; and took up a considerable Time.
When completed, the _white_ Flag was extended exactly half a Mile from
the Car.
[Sidenote: Cattle discovered from the Balloon.]
[Sidenote: Ballast thrown out,]
67. Perceiving that the Balloon was descending very _briskly_, by the
Appearance of Cattle in the Corner of a Field; first, _one_ of the two
solid Weights was cast down: then the _other_.
[Sidenote: Time in falling estimated.]
A Return of Sound to the Balloon, from the lighter which weighed five
Pounds, was heard in 130 Countings of a Watch, which made 120 of the
same full Beats in a Minute.
Before the Weight became invisible; it _appeared_ to move a good Deal
out of the Perpendicular: owing either to an under Current; or to a
Deception of Sight, respecting the horizontal Motion of the Balloon in
a different Direction, during the Descent of the Stone.
The other must have fallen in soft Grass, or otherwise: as it was not
heard.
CHAPTER XI.
Section 68. At 28 Minutes past II. the solid Weights before mentioned
were thrown out.
At 29 Minutes the Barometer had fallen to 25 Inches.
[Sidenote: Balloon reascending.]
A Handful of Feathers were sent adrift, which fell quick: demonstrating
_likewise_ the Ascent of the Balloon, a second Time: but, tho’ 12
Pounds lighter, it did not seem to regain its original Height: judging
+merely+ from this Circumstance, that no more Gass escaped _visibly_
from the Mouth.
[Sidenote: Apparent Size and Situation of the _white_ Flag.]
69. It is somewhat remarkable, that, on repeated Enquiries from
unprejudiced Persons, the _white_ Flag, when suspended from the Car
above 440 Yards, appeared 4 Yards long: and when at the end of the
_half Mile_ Twine, seemed about 8 Yards long, to Spectators from
below, in different Places: that sometimes it appeared before, and
sometimes behind the Balloon: while to the Observer in the Car, it
seemed regularly to follow the Balloon: unless when a _new_ Motion was
impressed upon the latter: at which Time the _white_ Flag was situated
almost under the Car: or when the Balloon changed its Direction; the
Flag being _then_ not always _discoverable_.
When seen _edgewise_ or _foreshortened_; it woud _appear_ to be
_nearer_ the Car than it really was.
[Sidenote: Effect of the _white_ Flag on the Balloon.]
Public-domain text, read in full here on John Shaqi.
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