United States Naval Institute Proceedings, Томови 3-4U.S. Naval Institute, 1877 |
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Страница 57
... longitude , with the certainty of there meeting our fellow naviga- tors , are apt to forget under what difficulties our predecessors labored less than three centuries ago . It is my design to call the attention of the Institute briefly ...
... longitude , with the certainty of there meeting our fellow naviga- tors , are apt to forget under what difficulties our predecessors labored less than three centuries ago . It is my design to call the attention of the Institute briefly ...
Страница 62
... longitude of the earth in general is that space or upper face of the earth , which extendeth from West to East and again from East to West ; and the Latitude in general is that space which extendeth North and South even from one pole to ...
... longitude of the earth in general is that space or upper face of the earth , which extendeth from West to East and again from East to West ; and the Latitude in general is that space which extendeth North and South even from one pole to ...
Страница 63
... longitude : the latter being converted into departure by means of tables which give the length of a degree in every parallel of Latitude ; and this depart- ure used in the solution of the problem is reckoned on the Middle Lat- itude ...
... longitude : the latter being converted into departure by means of tables which give the length of a degree in every parallel of Latitude ; and this depart- ure used in the solution of the problem is reckoned on the Middle Lat- itude ...
Страница 64
... longitude in miles at each latitude , but the fact that these parallels were expanded in the ratio of the secant of the latitude , is entirely lost sight of , although Mer- cator's chart had then been before the world for a quarter of a ...
... longitude in miles at each latitude , but the fact that these parallels were expanded in the ratio of the secant of the latitude , is entirely lost sight of , although Mer- cator's chart had then been before the world for a quarter of a ...
Страница 68
... longitude 0 ° ) , Mercator placed the magnetic pole in longi- tude 180 ° , and in latitude 73 ° 30 ′ North ; and he thought that at this pole was a great rock of adamant whereunto all lesser rocks or needles touched with the lodestone ...
... longitude 0 ° ) , Mercator placed the magnetic pole in longi- tude 180 ° , and in latitude 73 ° 30 ′ North ; and he thought that at this pole was a great rock of adamant whereunto all lesser rocks or needles touched with the lodestone ...
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