Habitat 1,676 Hail 214 HAIL 75 Hail clouds 141 Hail prevention 93 HAIL PREVENTION 66 Hailstone growth 204 HAILSTONE GROWTH 68 Hailstones 181 Hailstone structure 97 Halides 110 Halley Station 65 Halogenated hydrocarbons 436 Halogens 510 Handbooks 153 Hardness 91 Hardness tests 78 Haze 231 He-3 65 Health 408 Health and preventive medicine 102 Heard and McDonald Islands 123 Heat balance 989 HEAT BALANCE 94 Heat capacity 170 Heat exchange 755 Heat flow 707 Heat flux 1,504 Heating 1,018 HEATING 221 Heat loss 422 Heat pipes 200 Heat pumps 120 Heat recovery 203 Heat sources 135 Heat transfer 4,198 HEAT TRANSFER 786 Heat transfer coefficient 160 Heat transfer - Mathematical analysis 66 Heavy metals 422 Heavy minerals 112 Heavy water 140 Height finding 305 Heinrich events 350 Helicopter methods 87 Helicopters 445 Helium 118 Heterogeneity 238 Heterogeneous nucleation 578 HF communication 147 High-grade metamorphism 86 High pressure 102 High pressure ice 262 High pressure tests 142 High-resolution methods 803 High temperature 100 Highway planning 299 Himalaya Mountains 179 Himalayas--Garhwal 72 Himalayas--Mount Everest 65 Histograms 149 Historical geology 1,164 History 2,899 Hoarfrost 415 Holocene 7,213 Homogeneous nucleation 128 Horizons 148 Hot oil lines 176 Houses 266 Human activity 3,045 Human ecology 787 Human factors 970 Human factors engineering 161 Humic substances 67 Humid environment 86 Humidity 1,399 Hummocks 434 Humus 77 Hydrates 654 Hydraulic conductivity 316 Hydraulic jets 138 Hydraulics 589 Hydraulic structures 1,452 Hydrocarbons 2,792 Hydrochemistry 1,610 Hydrodynamics 997 Hydroelectric energy 150 Hydrogen 832 Hydrogen bonds 440 Hydrogeochemistry 2,006 Hydrogeology 403 Hydrographs 357 Hydrography 1,390 Hydrologic cycle 956 Hydrology 8,010 HYDROLOGY 76 Hydromagnetic waves 82 Hydrothermal conditions 101 Hydrothermal processes 359 Hygroscopic water 110