Page:Handbook of Meteorology.djvu/302

 Clouds and visibility, 140

— alto-cumulus, 79

— alto-stratus, 77

— billow, 75

— classified, 73, 75

— cirro-cumulus, 77

— cirro-stratus, 77, 122, 172

— cirrus, 75

— cirrus haze, 77, 122, 172

— cirrus uncinus, 75

— cumulo-nimbus, 81, 83

— cumulus, 81, 83

— mammato-cumulus, 79

— nimbus, 79

— rain, 87

— scarf, 87

— strato-cumulus, 79

— stratus, 83

— undulatory, 87

— unusual forms, 87

— velo, 71, 140

Cloudiness, comparative, 91

— distribution of, 89

— minimum, 91

Cohesion, 12

Cold wave, 152

Colorado desert, 109

Condensation, 61

— conditions of, 62

— forms of, 64

Convectional layer, 57

Corona, 120

Counter sun, 122

Counter trade winds, 50

Cross winds, 237

Crystallization, 12

Day, length of, 23, 283

Degree, determination of, 177

— values, 21

Dew, 64

Dew point, 62

Diathermancy, 17

Diffusion of moisture, 60

Doldrums, 52, 97

Downdraughts, 54

Ductility, 12

Dust and city fogs, 127

Dust and condensation, 127

— atmospheric, 8, 61

— bacterium content of, 132

— counters, 126

— effects of on absorption, 37

— electrification of, 124

— nuclei of condensation, 61

— sources of, 128

— storms, 142

— temperature effects of, 129

— wind-blown, 131

Earth's axis, inclination of, 23, 25

Electricity, atmospheric, 109, 110

— extra-terrestrial influences, 110

— of rain and snow storms, 110

Ether, 10, 108

Ether wave indicator, 109

Evaporation, 60

— latent-heat of, 20

— measurement of, 220

— rate of, 60

Evaporimeters, 220

Expansion-contraction, 12

False cirri, 83

Fog, advection, 68

— - and visibility, 139

— city, 69

— formation of, 68

— radiation, 69

— sea, 139

Freezing mixtures, 256

Frost, 65

— killing, 67

— probabilities, 66

— warnings, 65

Gases, properties of, 13

Gravity defined, 14

Greely quoted, 46

Growing season (map), 66, 67

Hail stones, structure of, 105

Hail storms, bombarding of, 105

forecasts of, 106

loci of, 105