6SIGNS OF RISING.
58CHAPTER LI.
7SIGNS OF DESCENT.
59CHAPTER LII.
8SIGNS OF PROGRESSIVE HORIZONTAL MOTION.
60ON THE MEANS OF SUSTAINING A BALLOON ABOVE THE SURFACE OF THE WATER, BY A TEMPORARY LOSS OF BALLAST: AND OF RECOVERING THE BALLAST.
9SIGNS OF NEW AND SUDDEN HORIZONTAL CURRENTS.
61A GENERAL OBSERVATION.
10PREPARATIONS FOR ASCENT.
62ANOTHER METHOD OF SUSTAINING A BALLOON OVER WATER, WITHOUT LOSS OF GASS, OR OF BALLAST.
11ASCENT WITH 20lb. OF LEVITY.
63ON THE NECESSITY OF ASCERTAINING THE PROPER MODES OF DIRECTION, BY DIFFERENT AND FREQUENT EXPERIMENTS.
12BALLOON VERGING TO THE SEA.
64NEW MODE OF ASCENT, TO DETERMINE THE INSTANT THE BALLOON IS ARRIVED AT ANY GIVEN HEIGHT: TO MEASURE THE HEIGHTS: AND TO ESTIMATE THE DENSITIES OF THE AIR AT THE GIVEN HEIGHTS. ALSO, A METHOD OF ASCENDING TO A FIXED BAROMETRIC HEIGHT: THERE TO REMAIN SUSPENDED IN EQUILIBRIO.
13OBJECTION REMOVED.
65ON BAL LOONS. THEIR DEFECTS AND FARTHER IMPROVEMENTS.
14CHAPTER VIII.
66OF THE AIR-BOTTLE BALLOON.
15OTHER AËRIAL SCENES DESCRIBED.
67SUPERIORITY OF THE AIR-BOTTLE TO AN INTERIOR BALLOON.
16CHAPTER X.
68HINTS FOR THE DIRECTION OF THE BALLOON.
17CHAPTER XI.
69HINT FOR A VANE-SAIL TO PREVENT THE BALLOON FROM TURNING ROUND, WHILE THE WIND CONTINUES STEADY.
18CHAPTER XII.
70DEFECTS, IN THE COMPOSITION FOR BALLOONS, REMEDIED. ALSO ON THE COCHUC-VARNISH.
19CHAPTER XIII.
71ON VARNISHES, CONTINUED.
20CHAPTER XIV.
72HINTS ON IMPROVEMENT OF THE MACHINERY.
21CHAPTER XV.
73ON THE UTILITY OF BALLOONS: AN INTRODUCTORY CHAPTER.
22BALLOON DESCENDING.
74ON THE UTILITY OF BALLOONS.
23BALLOON STILL DESCENDING.
75THE PROCESS OF INFLATION.
24RE-ASCENT OF THE BALLOON.
76CHAPTER LXVIII.
25BALLOON STILL RE-ASCENDING.
77MENSURATION OF HEIGHTS.
26CHAPTER XX.
78METHODS TO ASCERTAIN THE TRUE HEIGHT.
27CHAPTER XXI.
79The use.
28BALLOON AT ITS GREATEST HEIGHT.
80The 4th Step, applied in the first Example.
29AIR WARMER ABOVE THAN BELOW.
81The practice.
30BALLOON ABOVE THE INFLUENCE OF WATER.
82The 5th Step, applied in the first Example.
31THIRD BALLOON-IRIS
83CHAPTER LXXII.
32SENSATIONS ACCOMPANYING THE BALLOON.
84The use.
33USEFUL CONCLUSIONS.
85The practice. The 7th Step applied in the first Example.
34CHAPTER XXVIII.
86THE SECOND TABLE.
35CHAPTER XXIX.
87THE THIRD TABLE, OR TABLE FOR TENTHS:
36CHAPTER XXX.
88The use.
37CHAPTER XXXI.
89The practice. The 12th Step applied in the first Example.
38CHAPTER XXXII.
90THE FOURTH TABLE,
39CHAPTER XXXIII.
91With a distinct View of the Work. (Ph. Tr. for 1777, Page 579.)
40THE SEQUEL.
92PRACTICE OF THE FIRST TABLE IN THE SECOND EXAMPLE.
41Rixton-Moss, Lancashire, IV. o’Clock P.M.
93PRACTICE OF THE THIRD EXAMPLE,
42CHAPTER XXXV.
94PRACTICE OF THE FOURTH EXAMPLE,[134] FOR MEASURING SMALL HEIGHTS.
43CHAPTER XXXVI.
95A CALCULATION TO ASCERTAIN THE HEIGHT OF THE BALLOON ON THE DAY OF ASCENT: ONE BAROMETER AND ONE THERMOMETER ONLY, BEING TAKEN UP INTO THE CAR.
44OF THE WEATHER, IN THE VICINITY OF CHESTER, ABOUT THE TIME OF THE EXCURSION.
96HINTS, ON THE CHEAPEST METHOD OF INFLATING BALLOONS, WITH DESCRIPTIONS OF DIFFERENT MODELS FOR A GASS-STEAM-ENGINE.
45ON CERTAIN APPEARANCES AT DIFFERENT ALTITUDES OF THE BALLOON.
97I.
46CONJECTURES ON THE CAUSES OF THE CIRCULAR TRANSPARENCY TO A CERTAIN DISTANCE BELOW THE BALLOON, AND OF THE RED LIGHT FROM THE SEA AND RIVERS, WHEN SEEN ABOVE THE LEVEL OF THE SUPERIOR CLOUDS.
98II.
47ON THE EXCESSIVE DIMINUTION OF OBJECTS ON THE SURFACE OF THE EARTH, TO A SPECTATOR SITUATED ABOVE THE REGION OF CLOUD, AT THE BAROMETRIC HEIGHT OF NEAR A MILE AND HALF, PERPENDICULAR.
99III.
48CONJECTURES ON THE CAUSES WHICH INFLUENCE THE DESCENT OF BALLOONS IN THEIR PASSAGE OVER WATER.
100IIII.
49CHAPTER XXXXII.
101V.
50CHAPTER XXXXIII.
102VI.
51OBJECTION TO THE THEORY REMOVED.
103An alphabetical index of the contents:
52CHAPTER XXXXV.
