Balloon ascents, international, 108 _et seq._ ---- crossing the Atlantic by, 92 ---- invention of hot-air, 19 ---- kite, 94 Balloons, 19, 20, 21, 37, 68, _et seq._ ---- captive, 76, 93, 146 ---- changes of temperature observed in, 71, 73, 75, 77, 84, 88, 90 ---- changing the direction of, 93 _Ballons-sondes_, 98 _et seq._ Barometer, 15, 16, 85, 113 Baro-thermograph of Richard, 102 Barral, balloon ascent, 73, 84 Batavia, Java, international cloud measurements, 65 Batut (A.), photography from kites, 123 Berson (A.), balloon ascents, 81, 87 _et seq._ Bert (P.), respiration of oxygen, 82 BesanÁon (G.), 98, 99, 101, 104 Bezold (W. von), wave-cloud, 40 Biot (J. B.), balloon ascent, 73 Birt (W. R.), kite at Kew Observatory, 122 Bixio, balloon ascent, 73, 84 Blanc, Mont, 20, 21 Blanchard, balloon ascent with Jeffries, 70, 71 Blue Hill Observatory, 47, 51, 53, 64, 108, 126 _et seq._ Bonaparte (Prince Roland), patron of aeronautics, 112 Bonpland (A.), ascent in Andes, 20 Bonvallet (L.), exploring balloons, 99 Bouguer (P.), height of freezing-point, 18 Boyle (R.), 16 C Cailletet (L.), 112, 113 Cambridge, Mass., clouds measured at, 53 Castelli (B.), invented rain-gauge, 13 Cavallo (T.), showed lightness of hydrogen, 69 Celsius (A.), thermometer, 14 Charles (J. A. C.), ascent in hydrogen balloon, 19, 68 Cimento, Accademia del, 14 _Cirrus_ balloon, 106 Clayton (H. H.), 45, 47, 53, 62, 133, 147, 167 Cloud, amount of, 47 _et seq._ ---- atlases, 42, 43, 44 ---- Committee, International, 44, 65 ---- -year, international, 65 Clouds, classification of, 41 _et seq._ ---- definitions of, 45 ---- formation of, 39 ---- observations of direction and relative velocity, 51, 65 ---- measurements of height and velocity, 52, 53 _et seq._, 65, 121 ---- on Jupiter, 51 ---- relation to forecasting, 63-4 Cotte (L.), on clouds, 38 Coxwell (H.), aeronaut for Glaisher, 75 _et seq._ CrocÈ-Spinelli (J.), ascent in _Zenith_, 82 Cyclones, 59, 170 D Dalton (J.), water-vapour in the air, 38 Daniell (J. F.), mountains a registering thermometer, 13 Davis (W. M.), cloud measurements, 53 Deluc (J. A.), theory of clouds, 42 De Saussure (H. B.), 20, 42, 73 ---- (H. B.), ascent of Mont Blanc, 20 Deutsche-Seewarte, Hamburg, 43 Donaldson (W. H.), proposed crossing Atlantic in a balloon, 92 E Eddy (W. A.), 123, 124 _et seq._ Eiffel Tower, Paris, 23, 152 Ekholm (N.), 53, 92 Electricity, atmospheric, 70, 76, 121, 141 Espy (J. P.), kites to verify calculated height of clouds, 121 Etna, ascended by ancients, 12 Euler (L.), theory of kites, 118 Exploring the atmosphere, methods of, 35 _et seq._, 145-6 F