The Wonders of the Heavens Being a Popular View of Astronomy Including a Full
The Wonders of the Heavens Being a Popular View of Astronomy Including a Full
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In our eReader you can find the full English version of the book. Read The Wonders of the Heavens Being a Popular View of Astronomy Including a Full Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book The Wonders of the Heavens Being a Popular View of Astronomy Including a Full
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The best time for drawing a meridian line in this manner is about the summer solstice, because the sun changes his declination with the least, and his altitude with the greatest, rapidity at that time.
If the casement of a window on which the sun shines at noon be exactly upright, you may draw a WONDERS OFTHE HEAVENS.
263 line along the edge of its shadow on the floor when the shadow of the pin is exactly on the meridian line of the board ; and, as the motion of the shadow of the casement will ...be much more sensible on the floor than that of the shadow of the pin on the board, you may know to a few seconds when it touches the meridian line on the floor, and so regu- late your clock for the day of observation by that line and the equation tables before mentioned.
As the equation of time, or difference between the time shown by a well-regulated clock and a sun-dial, depends upon two causes, namely, the obliquity of the ecliptic, and the unequal motion of the earth in it, we shall explain first the effects of these causes separately considered, and then the united effects resulting from their combination.
What to read after The Wonders of the Heavens Being a Popular View of Astronomy Including a Full?
You can find similar books in the "Read Also" column, or choose other free books by Duncan Bradford to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
The best time for drawing a meridian line in this manner is about the summer solstice, because the sun changes his declination with the least, and his altitude with the greatest, rapidity at that time.
If the casement of a window on which the sun shines at noon be exactly upright, you may draw a WONDERS OFTHE HEAVENS.
263 line along the edge of its shadow on the floor when the shadow of the pin is exactly on the meridian line of the board ; and, as the motion of the shadow of the casement will ...be much more sensible on the floor than that of the shadow of the pin on the board, you may know to a few seconds when it touches the meridian line on the floor, and so regu- late your clock for the day of observation by that line and the equation tables before mentioned.
As the equation of time, or difference between the time shown by a well-regulated clock and a sun-dial, depends upon two causes, namely, the obliquity of the ecliptic, and the unequal motion of the earth in it, we shall explain first the effects of these causes separately considered, and then the united effects resulting from their combination.
What to read after The Wonders of the Heavens Being a Popular View of Astronomy Including a Full?
You can find similar books in the "Read Also" column, or choose other free books by Duncan Bradford to read onlineMoreLess
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