Light Science for Leisure Hours, a Series of Familiar Essays on Scientific Subjects Natural Phenomena EtcLongmans, Green, and Company, 1871 - 316 páginas |
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Página 5
... difficulties pointed out ( very properly , it need hardly be remarked ) by Sir David Brewster been wholly removed ; but it has been found that a much closer bond of sympathy exists between the magnetised needle and the auroral streamers ...
... difficulties pointed out ( very properly , it need hardly be remarked ) by Sir David Brewster been wholly removed ; but it has been found that a much closer bond of sympathy exists between the magnetised needle and the auroral streamers ...
Página 10
... , because there are many difficulties in forming a general opinion as to the nature of the auroral light , while there are circum- stances which would lead us to anticipate that the light ΙΟ LIGHT SCIENCE FOR LEISURE HOURS .
... , because there are many difficulties in forming a general opinion as to the nature of the auroral light , while there are circum- stances which would lead us to anticipate that the light ΙΟ LIGHT SCIENCE FOR LEISURE HOURS .
Página 13
... difficulty presents itself . There is no known terrestrial element whose spectrum has a bright line precisely in the position of the line in the auroral spectrum . And mere proximity has no significance whatever in spectroscopic ...
... difficulty presents itself . There is no known terrestrial element whose spectrum has a bright line precisely in the position of the line in the auroral spectrum . And mere proximity has no significance whatever in spectroscopic ...
Página 14
... difficulties connected with the appearance of the object . For example , its light has often been observed to flicker or coruscate in a manner which it seemed difficult to ascribe to the motions of our own atmosphere . Then again there ...
... difficulties connected with the appearance of the object . For example , its light has often been observed to flicker or coruscate in a manner which it seemed difficult to ascribe to the motions of our own atmosphere . Then again there ...
Página 44
... - counted for without assigning a slower motion to the moon in long - past ages than she has at present ! Here was a difficulty which long puzzled mathe- maticians . One after another was foiled by it . 44 LIGHT SCIENCE FOR LEISURE HOURS .
... - counted for without assigning a slower motion to the moon in long - past ages than she has at present ! Here was a difficulty which long puzzled mathe- maticians . One after another was foiled by it . 44 LIGHT SCIENCE FOR LEISURE HOURS .
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Términos y frases comunes
appearance arctic Arica astronomers Atlantic aurora auroral light Author bright line cause chromosphere circumstance coloured comet consider continually course crater Crown 8vo Crozet Island cyclones depths destructive disturbance doubt earth earthquake eclipse effects Encke enormous equator equatorial eruption evidence fact feet force gradually Greenland Gulf Stream Halley's method heat HISTORY horse Illustrations interesting Ischia islands John Herschel JOHN STUART MILL land lava length less magnetic needle Maps Maury miles moon motion mountain nature nearly North Pole northern observations ocean odds pass peculiarity planet Post 8vo present reached recognised region remarkable result revised says scientific sea-wave Second Edition seems seen ship shores Sir Charles Lyell solar spectroscope spectrum Spitzbergen storm sun's distance supposed surface swept terrestrial theory tion transit transit of Venus vapour Venus Vesuvius volcanic vols voyagers westerly whole winds Woodcuts zodiacal light
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