LINES SHOWING THE MEAN SEA SURFACE TEMPERATURE IN AUGUST.
LINES SHOWING EQUAL ANNUAL RANGE OF TEMPERATURE FOR THE GLOBE.
ABICH, Prof., on hailstones, 143
Absolute humidity, 110 Absorption of sun's heat by atmo- sphere, 57, 211
Abyssinia, thunderstorms in, 191 Actinometer, Herschel's, 52; Bal- four Stewart's, 52
Adams (W. G.), on return shock of lightning, 182
Admiralty, the, wind and current charts, 282, 314
'Advance' (Lieut. de Haven), drift of the, 309 Agulhas current, the, 308
Air, atmospheric, effects of change of level on, 288
in tube of barometers, 82; detec- tion of, 83
-motion in depressions and anti- cyclones, 357; in cyclones, 366, 369, 374
Aitken, on fogs, 120
Alaska, contrast of climates in, 306 Alnwick, lanes cut in the woods by a storm at, 155
Alps, observations of radiation in the, 57
Altitude correction for barometers, 85, 391
America, South, rainfall of, 328;
climate of the south point of, 343 Andes, rainfall of the, 328 Andries, on causes of low pressure near South Pole, 251
Anemometer, Hooke's, 150; Wild's,
150; Lind's, 150; Osler's, 150;
Cator's, 151; Robinson's, 151; theory of Robinson's, 152; diffi- culty about satisfactory exposure of, 153
Aneroid, the, 79; defects of the, 80 Animals, distribution of, 339, 342 Annual range of temperature, 216,
339; of pressure, 93; of wind velocity in British Isles, 164; of thunderstorms, 191
Anomaly, the thermic, 232 Antarctic regions, low pressure over the, 251; ocean currents in the, 298, 309 Anthelia, 203 Anti-cyclones explained, 356; air motion in, 357; contrasted with depressions, 357; slight motion of, 361
Antisana, pressure at, in winter and summer, 241
Anti-trades explained, 245, 264; Laughton on, 274
Apjohn, formula for dry and wet bulb hygrometer, 108
Arabs, the, their knowledge of monsoons, 266
Arago, on globular lightning, 175 Arctic regions, solar radiation in, 57; thunderstorms in, 191; snow drift in, 327
- current, the American, 298; in Pacific, 306; in Polar regions, 309 Aristotle, on monsoons, 266 Armagh, annual period of wind velocity at, 164
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