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
102. There being no proper Opportunity of closing the Mouth of the
Balloon on its _near_ Approach to the Sea, or during the _Swiftness_ of
its Descent; tho’ there had been _frequent Inclination_ to attempt it;
this _little_ but +essential+ Work was instantly resolved upon. And the
more so, as the Mouth had continued open _from_ the first: and as Mr.
Lunardi did not _happen_ to mention this Circumstance: the Utility of
which, tho’ _too late_ to be put in Practice, had, but a few Minutes
before, very plainly suggested itself. His Directions were, to _open_
the Valve in order to descend: which woud _possibly_ have _encreased_
the Rapidity of Descent: and, by _introducing_ a thorou’ Air _upwards_,
while the Motion of the Balloon was in a _contrary_ Direcion, might
have occasioned a _dangerous Rupture_ of the lower Parts of the
Balloon, _which_ actually took Place in a preceding Excursion.
[Sidenote: The Balloon drawn _sideways_.]
103. The Balloon, tho’ rising _quick_, seemed _not_ to be wholly
disengaged from the Ground, but to have received a Check; and to _lean_
a little out of the Perpendicular: particularly the Car, which was
evidently drawn a _different_ Way _from_ the Balloon.
[Sidenote: The half Mile _white_ Flag impeding the Balloon.]
On perceiving that the half Mile _white_ Flag, fastened to the _upper_
Hoop of the Car, sensibly impeded the Elevation of the Machine,
by _trailing_ along the Ground, (the Balloon being yet within the
Influence of the Sea-Breeze, or _lower_ Current of Air;) the Question
was, whether it woud not be imprudent to suffer the Balloon to rise
near half a Mile, before the _white_ Flag; was _disentangled_ and free
to follow it.
For as neither the _Twine_, nor the _lower Cords_ of the Balloon were
of Silk; the Twine having lain on the Trees or +moist+ Ground, might
become a +conductor+ from the Earth to any Stratum of Air that had
+less+ or +more+ than what is called its natural Quantity[35] of the
+electric+ Fluid.
[Sidenote: Twine _cut_, lest it shoud prove a _Conductor_ of
_Electricity_.]
Adding to the above, a Wish to rise higher the _second_ Time than the
first; stooping for the Scissars, the String was _cut_: reserving a
Remainder to tye the Neck of the Balloon; which was immediately done by
gathering the Parts of the Balloon into the Hand, wrapping a Couple of
Yards loosely round, and tying them on a +slip+ or +bow+ Knot: one End
of which was +purposely+ left hanging three Feet downwards, to _untye_
instantly on Occasion.
[Sidenote: Additional Levity of one Pound.]
This additional Levity of _nearly_ one Pound, gave the whole Quantity
of Ballast thrown over in a _few_ Minutes, _nearly_ 32 Pounds.
[Sidenote: Remarks on the Balloon.]
104. The intelligent Farmer who stood near the Balloon, when it
alighted at Bellair, had observed it for some Time _before_ near the
Sea, and marked its Return, as coming _apparently_ from _Overton_.
Public-domain text, read in full here on John Shaqi.
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