 ... of magnetic force of an amount absolutely unknown to affect a compass half a mile distant. Such deflections of the compass are due to magnetic minerals in the bed of the sea under the ship, and when the water is shallow, and the force strong, the...  Special Publications - Seite 191900Vollansicht - Über dieses Buch
 | 1893 - 666 Seiten
...affect a compass half a mile distant. Such deflections of the compass are due to magnetic minerals ill the bed of the sea under the ship, and when the water...of disturbance will be small, unless there are many centres near together. The law which has hitherto been found to hold good as regards local magnetic... | |
 | Great Britain. Hydrographic Department - 1897 - 938 Seiten
...diminishes in such rapid proportion as the distance from it increases, that it would require a local centre of magnetic force of an amount absolutely unknown...of disturbance will be small, unless there are many centres near together. The law which has hitherto been found to hold good as regards local magnetic... | |
 | 1900 - 580 Seiten
...diminishes in such rapid proportion as the distance from it increases that it would require a local centre of magnetic force of an amount absolutely unknown...of disturbance will be small, unless there are many centres near together. The law which has hitherto been found to hold good as regards local magnetic... | |
 | 1911 - 684 Seiten
...diminishes in such rapid proportion as the distance from it increases that it would require a local centre of magnetic force of an amount absolutely unknown...shallow, and the force strong, the compass may be tsrnporarily deflected when passing over such a spot, but the area of disturbance will be small, unless... | |
 | Squire Thornton Stratford Lecky - 1918 - 966 Seiten
...confirming the previous occasion's observations. This place happens to be on the line of No Variation. Such deflections of the compass are due to magnetic...and the force strong, the compass may be temporarily deranged when passing over such a spot, but the area of disturbance will be small, unless there are... | |
 | United States. Hydrographic Office - 1920 - 542 Seiten
...shows that such disturbance of the compass in a ship afloat is experienced in many places on the globe. Such deflections of the compass are due to magnetic...the area of disturbance will be small unless there arc many centers near together. Aids — Buoys. — Too much reliance should not be placed on buoys... | |
 | United States. Hydrographic Office - 1920 - 316 Seiten
...would require a local center of magnetic force of an amount absolutely unknown to affect a compass | mile distant. Such deflections of the compass are...deflected when passing over such a spot ; but the area of disturbances will be small unless there are many centers near together. Aids — Buoys. — Too much... | |
 | United States. Hydrographic Office - 1920 - 526 Seiten
...places on the globe. center of magnetic force of an amount absolutely unknown to affect a compass | mile distant. Such deflections of the compass are...be temporarily deflected when passing over such a spdt; but the area of disturbance will be small unless there are many centers near together. Aids —... | |
 | United States. Hydrographic Office - 1920 - 384 Seiten
...places on the globe. center of magnetic force of an amount absolutely unknown to affect a compass | mile distant. Such deflections of the compass are...water is shallow and the force strong, the compass maybe temporarily deflected when passing over such a spot; but the area of disturbance will be small... | |
 | Great Britain. Hydrographic Department - 1925 - 490 Seiten
...increases that it would require a local centre of magenetic force of an amount absolutely unknown to effect a compass half a mile distant. Such deflections of...of disturbance will be small, unless there are many centres near together. It is very desirable that whenever a ship passes over an area of local magnetic... | |
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