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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... its way towards the true north . He discovered the minute vibration which the needle makes each day across its mean position . He noticed that this vibra- LONDON : PRINTED BY SPOTTISWOODE AND CO . , NEW B 2 THE AURORA , 3.
... its way towards the true north . He discovered the minute vibration which the needle makes each day across its mean position . He noticed that this vibra- LONDON : PRINTED BY SPOTTISWOODE AND CO . , NEW B 2 THE AURORA , 3.
Página 3
... its way towards the true north . He discovered the minute vibration which the needle makes each day across its mean position . He noticed that this vibra- tion is variable in extent ; and so he was B 2 THE AURORA . 3.
... its way towards the true north . He discovered the minute vibration which the needle makes each day across its mean position . He noticed that this vibra- tion is variable in extent ; and so he was B 2 THE AURORA . 3.
Página 13
... means to infer that he supposes the substance which causes the presence of the bright line has any resemblance to that element . Until we can find an element which has a bright line in its spectrum absolutely coincident with the bright ...
... means to infer that he supposes the substance which causes the presence of the bright line has any resemblance to that element . Until we can find an element which has a bright line in its spectrum absolutely coincident with the bright ...
Página 28
... mean position of the needle , and as the excursions are small , never exceeding the fifth part of a degree , while the mean position of the needle lies some 20 ° to the west of north , it is clear that the excursions are only nominally ...
... mean position of the needle , and as the excursions are small , never exceeding the fifth part of a degree , while the mean position of the needle lies some 20 ° to the west of north , it is clear that the excursions are only nominally ...
Página 38
... mean solar day , and is practically determined by a reference to what is called a sidereal day - the interval , namely ... means of weighing , measuring , and valuing terrestrial objects with an exactitude which is at present beyond our ...
... mean solar day , and is practically determined by a reference to what is called a sidereal day - the interval , namely ... means of weighing , measuring , and valuing terrestrial objects with an exactitude which is at present beyond our ...
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