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

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