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(*) A fall of four Inches and six lines of the Barometer, gives, according to HALLEY's Experiments, about 1470 yards in height, and in seven minutes, is at the rate of about seven miles an hour. [Second Edit.]
(+) Twenty-eight Degrees of FAHRENHEIT. [Second Edit.]
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(*) At the height of 2610 yards, near one mile and an half. [Second Edit.]
(+) Nine Degrees of REAUMUR are nearly fifty Degrees of FAHRENHEIT. [Second Edit.]
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(*) At twenty Inches of the Barometer, the Degree of cold was about fifty Degrees of FAHRENHEIT. [Second Edit.]
(+) At the height of 1960 yards. [Second Edit.]
(S) Twelve Degrees of REAUMUR's Thermometer, are about fifty-six Degrees of FAHRENHEIT. [Second Edit.]
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We were only one hour and three quarters in our direct course ; half an hour being spent in hovering over the City of Rouen.--I observed that in the greatest rapidity of our course, a lamp would not have been extinguished, and thence I conclude, that sails adapted to an Aerostatic Machine would never swell.
(Signed) BLANCHARD, BOBY.
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The following is the English Weight of M. BLANCHARD's whole Apparatus, at the time of his Ascension from the Court of the Old Barracks at Rouen ; viz.
lib.
The Globe and appendent Tube, about -- 114
The Net and large Hoop, -- -- 71
The Vessel and Cords by which it was suspended, 84
M. BLANCHARD, -- -- -- -- -- 124
M. BOBY, -- -- -- -- -- 113
Provisions and Ballast, -- -- -- -- 235
Total, 741