 | Pilot guides - 1893 - 666 pages
...that disturbance of the compass in a ship afloat is experienced only in a few places on the globe. Magnetic laws do not permit of the supposition that...is the visible land which causes such disturbance, becaiise the effect of a magnetic force diminishes in snch rapid proportion as the distance from it... | |
 | Great Britain. Hydrographic Department - Notices to mariners - 1897 - 938 pages
...that disturbance of the compass in a ship afloat is experienced only in a few places on the globe. Magnetic laws do not permit of the supposition that...distance from it increases, that it would require a local centre of magnetic force of an amount absolutely unknown to affect a compass half a mile distant. Such... | |
 | Aden, Gulf of - 1900 - 580 pages
...that disturbance of the compass in a ship afloat is experienced only in a few places on the globe. Magnetic laws do not permit of the supposition that...distance from it increases that it would require a local centre of magnetic force of an amount absolutely unknown to affect a compass half a mile distant. Such... | |
 | Pilot guides - 1911 - 684 pages
...such disturbance of the compass in a ship afloat is experienced only in a few places on the globe. Magnetic laws do not permit of the supposition that...distance from it increases that it would require a local centre of magnetic force of an amount absolutely unknown to affect a compass half a mile distant. Such... | |
 | Squire Thornton Stratford Lecky - Navigation - 1918 - 966 pages
...STRAIT OF MAGELLAN. Compass ragaries. Distance law of of a magnetic force diminishes in such exceedingly rapid proportion as the distance from it increases, that it would require a local centre of magnetic force of an amount absolutely unknown to affect a compass half a mile distant. It... | |
 | United States. Hydrographic Office - Pilot guides - 1920 - 362 pages
...compass in a ship afloat is experienced in many places on the globe. diminishes so rapidly with distance that it 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 due to magnetic minerals in the bed of the sea... | |
 | United States. Hydrographic Office - Pilot guides - 1920 - 316 pages
...causes such disturbance, because the effect of a magnetic force diminishes so rapidly with distance that it 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 due to magnetic minerals in the bed of the sea... | |
 | United States. Hydrographic Office - Pilot guides - 1920 - 508 pages
...causes such disturbance, because the effect of a magnetic force diminishes so rapidly with distance that it 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 due to magnetic minerals in the bed of the sea... | |
 | Great Britain. Hydrographic Department - Pilot guides - 1925 - 490 pages
...such disturbance of the compass in a ship afloat is experienced only in a few places on the globe. Magnetic laws do not permit of the supposition that...distance from it increases that it would require a local centre of magenetic force of an amount absolutely unknown to effect a compass half a mile distant.... | |
 | Pilot guides - 1916 - 302 pages
...Observation shows that such disturbance of the compass in a ship afloat is experienced only in a few places. Magnetic laws do not permit of the supposition that it is the visible land which causes such disturbances, because the effect of a magnetic force diminishes in such rapid proportion as the distance... | |
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... 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... 
