. A new treatise on the practice of navigation at sea : containing all the details necessary to enable the mariner to become a good practical navigator. . e naked eye. In viewmjJupiter through a telescope, these loons make a beautiful appearance, together with the belt over hi*-equator, supposed to be caused by the swiftness of his diurnal motion, in drawing his clouds and vaporsinto that form. Saturn is the remotest of all the Planets which are useful in Navigation, and may be distinguished byhis pale and feeble light. His diameter is 79,042 miles. His distance from the Sun is about 900 milli
. A new treatise on the practice of navigation at sea : containing all the details necessary to enable the mariner to become a good practical navigator. . e naked eye. In viewmjJupiter through a telescope, these loons make a beautiful appearance, together with the belt over hi*-equator, supposed to be caused by the swiftness of his diurnal motion, in drawing his clouds and vaporsinto that form. Saturn is the remotest of all the Planets which are useful in Navigation, and may be distinguished byhis pale and feeble light. His diameter is 79,042 miles. His distance from the Sun is about 900 millions ofmiles. He performs his revolution in his orbit in 29 years 167 days, and turns on his axis once in 10-hours 16 minutes, and is attended by 7 moons. Planet is different from all the others when viewedtlirough a telescope, being furnished with a broad double luminous ring, which appears intended to increaj»the quantity of light received from the Sun, and which, on account of his vast distance from that bodymust b# verv feeble. m NAUTICAL ASTRONOMY. DIAGRAM O? -^HF. SPHERE, Drawn on the Plane of the Meridian in 45° NoriJ- Latttu^ Fig. Tkt 9p»€taior is supposed to be situated at a great distance East of the Earth, and lookwg towa^ th* Wed. having North on the Right and South on the Left. TO CONSTRUCT THE FIGURE. Tak. 60- from the line of Chords on the Plane Scale, ind describe a circle, which ^» /•P;!?:•ent the Circular Dome of the Heavens, and from the centre draw a l«««\«;:*i«J^^^^J^J^represent the Earth in the centre of the Sphere. Draw a horizontal hne through he ««°^ ^^^will cut the Earth in two halves, and represents the Rational Horizon Draw another line P«JP«°f ^J;to it, which will divide the Heavens into four equal parts of 90* each. This line or ^irde is calledth*Prime Vertical, and passes through the East and West points in the centre. The top or point overhead the Zenith, which i. 90 from the Rational Horizon; and the bottom
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectnavigat, bookyear1902
