Light Science for Leisure Hours: A Series of Familiar Essays on Scientific Subjects, Natural Phenomena, &c. &c

action appear Aratus arctic Arica astronomers Atlantic aurora auroral light bright line cause chance chromosphere circle circumference circumstance comet consider consideration constellations continually course crater Crozet Island cyclones depths destructive difficulty disturbance doubt earth earthquake eclipse effects enormous equal equator equatorial eruption evidence fact feet force gradually Greenland Gulf Stream Halley's method heat height Homer horse hundred important instance Ischia islands John Herschel land latitudes lava length less magnetic needle mathematicians Maury miles moon motion mountain nature nearly North Pole observations ocean odds pass peculiarity planet present problem race reached recognised region remarkable respecting result says sea-wave seems seen Shield of Achilles ship shores side Sir Charles Lyell solar spectrum Spitzbergen storm sun's distance supposed surface survey swept terrestrial theory tion transit vapour Venus Vesuvius volcanic westerly white ball whole winds zodiacal light