Heat of the _Sun_, _greatest_, while in the Car, 59 Height _apparent_, proportioned to the _barometric_ Height, 49 - - of the Balloon, when _stationary_, at the _first_ Ascent, viz. 2332 Yards, 52, _a_. - - in the Balloon, conveys no Apprehension of falling, 156 - - of _principal_ Mountains, noted, 171 - - of a Mountain, seen at a _Distance_, calculated, 171, _a_, _a_. - - to which Balloons will _probably_ ascend, 278 - - fixed, Method of ascending to any, 299 - - of the Balloon, to ascertain by a _Quadrant_, 310 - - _preparatory_ Instruments to observe the, 350 - - of the Balloon measured, 425 Heights to measure, Densities to estimate, 299 - - of the Atmosphere, while they encrease in an _arithmetical_ Progression, the Densities are said to encrease in _geometrical_ Progression: the Meaning of such Terms, 301, _a_. Hemisphere _upper only_, of a Balloon to be inflated, 315 Hoop equatorial, its Use, 161, 315 Horizontal Motion, Signs of, _deceitful_, 18 Hours proper for the Ascent of _Balloons over Water_, 254, 255, 261 Hygrometer _Horse-Hair_, the _best_ Kind, 217 I. Illustration of the Scenery, 72 Improvement during the Process of Inflation, 24 Improvements how to be made in the propulsive Machinery, 319, 330 - - in the Process of Inflation by Acid, suggested, 339 - - suggested in the Process by Steam, 429 Incorrectness of Maps, 81 Inflation began at X. o’clock, with a small Balloon, 8 - - Degree of, to be limited, 278, 317 - - Process of, 339 - - by Means of Acid, Expence saved in the, 347 - - by Means of Steam, Expence saved in the, 429 Inflation by Means of Steam, Model and Mode of, 429 - - by Steam, preferred to the Process by Acid, 429 Information derived from the Shape of the Balloon, 159, 160 Inventory of the Voyage, 12 Iris 1st, round the Shadow of the Balloon, 56 - 2d, 73 - 3d, 136 Iron _bright_ and _fresh_, proper for inflation, 431 L. Landing, Manouvres during the, 98 - - first, near _Frodsham_ in _Cheshire_, 100 - - second, near _Warrington_ in _Lancashire_, 188 - - Precautions to secure a safe, 297 - - in _windy_ Weather, Precautions to secure a safe, 298 - - _improved_ Mode of, 317 Latitudes variable, _light Airs_ playing in Eddies, common in the, 241 Level of the _lowest_ Stratum of Clouds in _fair_ Weather, 93 - all Inequalities of Surface reduced to the _same_, 111 Light of a _red_ Colour, Conjectures concerning the, 222 M. Machinery _propulsive_, to be used in the _Calm_, _above Winds_, 319 Magnitude of Objects, Laws respecting the, 224 Manouvres seen at a _great_ Distance, 140 Map consulted, 174 Mast, a light _hollow_, 315 Meanders of the River _encreased_ to the _View_, 81 Mensuration of Heights and _Depths_ by Barometers, 348 Methods to ascertain the _true_ Height, 350