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
... force . Thus , he remarked that magnetic disturbances of the most remarkable character have often been observed when no aurora has been visible ; and he noticed certain peculiarities in the auroras observed near the polar regions ...
... force . Thus , he remarked that magnetic disturbances of the most remarkable character have often been observed when no aurora has been visible ; and he noticed certain peculiarities in the auroras observed near the polar regions ...
Página 7
... forces will permit . This has been abundantly confirmed , and is a fact of extreme importance in the theory of terrestrial magne- tism . Wherever the sun may be , either on the visible heavens or on that half of the celestial sphere ...
... forces will permit . This has been abundantly confirmed , and is a fact of extreme importance in the theory of terrestrial magne- tism . Wherever the sun may be , either on the visible heavens or on that half of the celestial sphere ...
Página 22
... force . When at length we yielded , we learned that we had gone many miles out of our road , and we did not reach home till several hours after dark . How it fared with our schoolfellows we know not , but a result overtook ourselves ...
... force . When at length we yielded , we learned that we had gone many miles out of our road , and we did not reach home till several hours after dark . How it fared with our schoolfellows we know not , but a result overtook ourselves ...
Página 50
... . One of the most firmly established principles of modern science is this - that where work is done , force is , in some way or other , expended . The doing of work may show itself in 50 LIGHT SCIENCE FOR LEISURE HOURS .
... . One of the most firmly established principles of modern science is this - that where work is done , force is , in some way or other , expended . The doing of work may show itself in 50 LIGHT SCIENCE FOR LEISURE HOURS .
Página 51
... force employed by the brakesman is not equivalent to the heat generated . Where , then , is the balance of force expended ? We all know that the train's motion is retarded , and this loss of motion represents the requisite expenditure ...
... force employed by the brakesman is not equivalent to the heat generated . Where , then , is the balance of force expended ? We all know that the train's motion is retarded , and this loss of motion represents the requisite expenditure ...
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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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