 COMPASS, or the declination of the magnetic or mariner's needle from the meridian or true north and south line at the undermentioned places in the United Kingdom, estimated for the year 1875. NB — The variation is westerly, that is, the magnetic pole...  A System of Mechanical Philosophy - Síða 351eftir John Robison - 1822 - 50 síðurHeildartexta - Um bókina
 | 1874 - 424 síður
...the table on page 10 showing the duration of moonlight. VARIATION OF THE COMPASS, or the decimation of the magnetic or mariner's needle from the meridian or true north and south line at the undermentioned places in the United Kingdom, estimated for the year 1874. NB —The variation... | |
 | 1884 - 418 síður
...showing the hours of darkness and duration of moonlight. VARIATION OF THE COMPASS, or the declination of the magnetic or mariner's needle from the meridian or true north -an d-south line at the undermentioned places in the United Kingdom, estimated for the year 1884. ,... | |
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