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
... direction towards which the needle turns ; and the summit of each arc lies exactly in that direction . From all this it appears , incontestably , that there is an intimate connection between the causes of auroras and those of ...
... direction towards which the needle turns ; and the summit of each arc lies exactly in that direction . From all this it appears , incontestably , that there is an intimate connection between the causes of auroras and those of ...
Página 21
... direction which we supposed would lead us home . We travelled on with full confidence in our pocket guide ; at each turning we consulted it in an artistic manner , carefully poising it and waiting till its vibrations ceased . But when ...
... direction which we supposed would lead us home . We travelled on with full confidence in our pocket guide ; at each turning we consulted it in an artistic manner , carefully poising it and waiting till its vibrations ceased . But when ...
Página 25
... direction , began to form the opinion that this change would continue , so that the needle would pass , through north - west and west , to the south . In fact , it was imagined that the motion of the needle would resemble that of the ...
... direction , began to form the opinion that this change would continue , so that the needle would pass , through north - west and west , to the south . In fact , it was imagined that the motion of the needle would resemble that of the ...
Página 26
... direction of the magnetic needle from due north to 23 ° west of north . We see that it is now necessary to explain , moreover , how it has happened that this gradual change has ceased , and has given place to a return towards the ...
... direction of the magnetic needle from due north to 23 ° west of north . We see that it is now necessary to explain , moreover , how it has happened that this gradual change has ceased , and has given place to a return towards the ...
Página 27
... direction and complexity . The Siberian oval , now distinct , was in 1787 merely a loop of the eastern line of no declination . The oval appears now to be continu- ally diminishing , and will one day probably disappear . We find here ...
... direction and complexity . The Siberian oval , now distinct , was in 1787 merely a loop of the eastern line of no declination . The oval appears now to be continu- ally diminishing , and will one day probably disappear . We find here ...
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