Page:Handbook of Meteorology.djvu/301



Adiabatic cooling, 61

Air bumps, 58

— cataracts, 59

— constituents of, 4

— convectional movements of, 19, 136

— density of, 44

— electrical conditions of, 109

— expansion coefficients, 39

— holes, 58

Airman and winds, 58

Alter shield, 229

Altitudes, air temperatures, 26, 28

— terrain, 28, 29

Ammonia, 7

Anemometer, Biram, 239

— Robinson, 239

Anti-trade winds, 50

Argon, 6

Ascending air currents, 45

Atmosphere, analyses of, 3

— depth of, 3

— unit of pressure, 39

Atmospheric optical phenomena, 1

— pressure, 39

Aureole, 121

Aurora borealis, 111

Avogadro’s law, 14

Barograms, interpretation of, 213

Barograph, 211

— adjustment of, 212

Barometer, 39

— aneroid, adjustment of, 207

construction of, 206

engineers’, 209

Barometer, aneroid, Goldschmidt, 207

— — pocket, 209

recording, 210

Barometer, mercury, 193

adjustment of, 198

construction of, 195

fixed cistern, 196

Fortin cistern, 195

observations, 202

rules for care of, 200

scales, 201

Beaufort scale, 239, 240

Bermuda high, 41, 145

Bigelow, F., quoted, 89

Billow clouds, 59, 237

Blizzard, 55

Bora, 55

British thermal unit, 21

Brooks, quoted, 85

Calm belts, 52, 53

Calorie, 21

Carbon dioxide of atmosphere, 3, 4, 5, 8

Cauliflower cloud, 83

Ceiling, atmospheric, 57, 137

Center of mass, 48

Chinook wind, 54

Chlorine, 8

Cloudbelt, equatorial, 97

Cloudbursts, 106

Cloud classification, 73, 75

— formation of, 71

— heights, 89, 286

— records, 85