 | 1820 - 774 pagine
...labour and consideration, it appeared to him, " that the errors produced by local attraction should be proportionate to the sines of the angles between the ship's head and the magnetic meridian ; and, therefore, in order to find this proportion, it seemed probable the following Rule would be... | |
 | 1818 - 472 pagine
...needle had dipped, it was the north end of the compass needle which was attracted by the iron work in the ship ; and that the errors produced by this...had dipped, observations again showed errors in the compass needle, but they were of a contrary nature to those experienced in the northern hemisphere,... | |
 | 1818 - 514 pagine
...needle had dipped, it was the north end of the compass needle which was attracted by the iron work in the ship ; and that the errors produced by this...had dipped, observations again showed errors in the compass needle, but they were of a contrary nature to those experienced in the northern hemisphere,... | |
 | Thomas Thomson - 1820 - 518 pagine
...easily calculated ; the anomalies produced by the attraction of the iron in the ship being found to be proportionate to the sines of the angles between the ship's head and the magnetic meridian. 8. A compass placed on either side of the ship's deck directly opposite to, or abreast of, the focus... | |
 | Thomas Thomson, Richard Phillips, Edward William Brayley - 1820 - 518 pagine
...easily calculated ; the anomalies produced by the attraction of the iron in the ship being found to be proportionate to the sines of the angles between the ship's head and the magnetic meridian. 8. A compass placed on either side of the ship's deck directly opposite to, or abreast of, the focus... | |
 | William Newton, Charles Frederick Partington - 1820 - 538 pagine
...at the magnetic equator. It is a maximum when the ship's course is W. or E., and it is proportional to the sines of the angles between the ship's head and the magnetic meridian. That a compass placed in either side of the ship's deck, directly opposite to the focus, gives a correct... | |
 | 1820 - 534 pagine
...at the magnetic equator. It is a maximum when the ship's course is W. or E., and it is proportional to the sines of the angles between the ship's head and the magnetic meridian. That a compass placed in either side of the ship's deck, directly opposite to the focus, gives a correct... | |
 | 1820 - 442 pagine
...vanishes at the magnetic equator. It is a maximum when the ship's course is Wor E., and it is proportional to the sines of the angles between the ship's head and the magnetic meridian. 5. A compass placed in either side of the ship's deck, directly opposite to the focus, gives a correct... | |
 | William Scoresby - 1820 - 632 pagine
...easily calculated ; the anomalies produced by the attraction of the iron in the ship, being found to be proportionate to the sines of the angles between the ship's head and the point of no anomaly, which point is most commonly the magnetic meridian, (a.) On the supposition that... | |
 | 1821 - 312 pagine
...labour and consideration, it appeared to him, " that the errors produced by local attraction should be proportionate to the sines of the angles between the ship's head and the magnetic meridian ; and, therefore, in order to find this preportion, it seemed probable the following Rule would be... | |
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... in the ship ; and that the errors produced by this combined attraction, were proportionate to the sines of the angles between the ship's head and the magnetic meridian. On the magnetic equator, where the dipping needle stands horizontally, or there... 
