Grain crops and sun-spots, 112; Chambers' tables, 113 Great amazing light in the north, 72 Gulf Stream, effects on climate, 111 Gunpowder, great condensing power, 44 Haze, what is, 43; how produced, 44; in clearest air, 45; stages of condensation, 46; in sultry weather, 46; dryness of air and visibility, 48 Health improved by change of air, 56 Highland air, few disease-germs, 55 Hoar-frost, frozen dew, 20; on under surfaces, 21 Humboldt, isotherms, 114 Hydrogen peroxide and cloud formation, 36 Hyeres, dust-particles, 29 Indian Ocean, colour, 75 Influenza, weather and, 107; six distinct epidemics, 108; spread of anti-cyclonic conditions, 109 Isobars by Buchan, 115 Isotherms by Humboldt, 114 Italian lakes, stages of condensation, 45 Job, on dew formation, 13 Kelvin recorder, 84; Aitken's radiation from snow, 86 Kew, instruments set, 121 Kingairloch, dust-particles, 30, 46 Kirchhoff, lower temperature of sun-spot, 112 Krakatoa, eruption of, dust-particles, 63 Le Verrier and weathercharts, 119 Lockyer, and sun-spots, 112 Lightning, electricity, 51; photographed, 51; sheet and forked, 51; ozone, 52 Lodge, electrical deposition of smoke, 83 London, coals consumed, 25; sulphur and fog, 25; fog in reign of Charles II., 81; Meteorological Office, 11, 120 Lord Derwentwater's Lights, 72 Lower animals, sensitiveness, 11 Lucerne, dust-particles, 30 MacLaren, Aitken's radiation from snow, 86 Magnesia, small affinity for water-vapour, 44 Man in the street, 11 Mediterranean, brilliant colour, 77 Mentone, dust-particles, 29 Merry Dancers of Shetland, 71 Meteors, producing dust, 37 Meteorological Council, London, 103; Office, 120; cone-warnings, 121; regular forecasts, 123 Milne Home on Ben Nevis, 103 Milton, dust numberless, 26 Moon, old, in new moon's arms, 58; weather indications, 59, 61 Mountain giants, 88; Adam's Peak, 89; Brocken, 89 Munich, International Meteorological Conference, 35 Murray, _Challenger_ Expedition, 114 Nardius, dew exhalation, 13 Newton, colour of sky, 77 Nimbus, cloud, 35 Oak and ash, on climate, 118 Ochils, one-coloured rainbow, 70 Pacific, colour, 75 Paris, aurora, 71; disease-germs, 55 Paton, Waller, bronze tints in sunsets, 64 Piazzi Smith, aurora, 72 Picket, dew-formation, 14 Pilatus, fine rain, 42 Polar lightnings, 72 Radiant heat, producing fine rain, 41 Radiation from snow, 86 Rain, 98; heavy rainfalls, 99 Rainbow, 68; forecasts, 62, 69; formation, 69; one-coloured, 70 Rains, it always, 40; radiant heat in process, 41; Ariel's song, 43 Rankin, dust-particles, Ben Nevis, 30 Richardson, devitalised air, 51 Rigi Kulm, dust-particles, 29 Rolier, aurora, 73 St. Paul's, London, disease-germs in air, 54