HEAT, 1 and light, 47 affects barometer, 328 sound, 414 animal, 83, 85, 277 applied to the bottom of boilers, 234 effects of, 2, 4, 103 expands water, 352 from beaten iron, 95 LATENT, 31, 75, 96 of candles, 75 dunghills, 277 fire, 37, 277 lime, 278 radiates, 196 sources of, 2 Heavy bread, 160 Hills larger in a fog, 148 HOAR FROST, 228 not found on trees, 230 under shrubs, &c., 230 of frozen fog, 231 on clear nights only, 229 on grass, 229 tombstones, 189, 230 very partial, 229 HONEY-DEW, 220 ants fond of, 221 effects of, 221 injures plants, 221 Hot cloudy night oppressive, 144 Hot weather abates activity, 93 appetite, 90 love for grease, 92 Hottest place at church, 316 Hoops used red hot, 122, 123 Horse shoes fitted hot, 123 Horses strike fire, 98 snuff up air, 152 uneasy in dull weather, 148 Houses catch fire spontaneously, 56 smoke in valleys, 66 Hunger, 88 promoted by cold, 90 day-light, 88 singing, speaking, work, 88 _See appetite._ Hydrogen gas, 34, 74 ICE, 349 lighter than water, 349 grows thicker, 353 dissolved by snow, 357 melted by sun, 126 Ice-bergs famous for echoes, 417 Idiots, 424 IGNIS FATUUS, 285 cause of, 286 Impure water purified, 72 Indian mode of striking fire, 99 Inflammable air, 34, 74 Insensible perspiration, 213 Intermediate clouds, 135 IRON, bad conductor, 185 cinders, 43 contains latent heat, 96 cooled by air, 246 convection, 246 radiation, 246 matches, 96 rust, 257 when most common, 258 prevented, 258 sonorous, 410 stoves, 174 Ironing-box, 155 Islands equable in temperature, 311 subject to wind, 309, 311 Itching in wet weather, 150 Jack o'lanthorn, _see ignis fatuus_ Jet of flame through bars, 45 Juice of lemons, 426 Jungle of Hindostan fatal, 266 Kendal rainy, 340 Keswick rainy, 340 KETTLE boils over, 115 quickly when covered with soot, 186 slowly when clean, 186 when new, 186 bottom should be sooty, 200 cold when water boils, 200 inside white, 200 lid hot, 201 furr, 262 holder, 167 not full after boiling, 115 runs over, 233 through the spout, 115 sings, 113, 233 top bright, 200 Kindling wet, 43 Lakes which never freeze, 355 Lamps, 74 Argand, 83 smoke, 82, 83 spirit, 155 _See candle._ Lamp-glasses, 83 Land air cold, 224, 311 breeze unhealthy, 309 Laplanders clad in skin, 183 LATENT HEAT, 31, 75, 96