A New Treatise on the Use of the Globes: With Notes and Observations : Containing an Extensive Collection of the Most Useful Problems, Illustrated by a Suitable Variety of Examples : Designed for the Use of Schools and Academies

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John J. Harrod, 1823 - 220 pàgines
 

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Pàgina ii - BBOWN, of the said district, hath deposited in this office the title of a book, the right whereof he claims as author, in the words following, to wit : " Sertorius : or, the Roman Patriot.
Pàgina 184 - Bring the sun's place in the ecliptic for the given day to the meridian, and set the index to XII. at noon : turn the globe westward till the index points to the given hour ; then the surface of the globe represents the exact face of the heavens at the given place.
Pàgina 187 - Elevate the pole so many degrees above the horizon as are equal to the latitude of the place ; find the sun's place in the ecliptic, bring it to the brass meridian, and set the index of the...
Pàgina 144 - Bring the sun's place to the eastern edge of the horizon, and set the index of the hour circle to 12 ; turn the globe eastward...
Pàgina 161 - ... to 12 ; then, if the time be after noon, turn the globe westward on its axis, till the index has passed over as many hours as the time is past noon ; but, if the time be before noon, turn the globe eastward till the index has passed over as many hours as the time wants of noon...
Pàgina 90 - Find the sun's declination and elevate the north or south pole, according as the declination is north or south so many degrees above the horizon, as are equal to the sun's declination ; bring the given place to the brass meridian, and set the index of the hour circle to 12.
Pàgina 74 - RULE. Bring the given place to the brass meridian and set the index to twelve : turn the globe eastward till the index has passed over as many hours as are equal to...
Pàgina ii - An Act for the encouragement of learning by securing the copies of maps charts and books to the authors and proprietors of such copies during the times therein mentioned,'* and extending the benefits thereof to the arts of designing engraving and etching historical and other prints, PHILIP MOORE.
Pàgina 143 - Equator, rise or set in 50 minutes of time in all latitudes. But the Moon's motion is so nearly in the Ecliptic that we may consider her at present as moving in it. Now the different parts of the Ecliptic, on account of its obliquity to the Earth's axis, make very different angles with the horizon as they rise or set.
Pàgina 43 - The names of the twelve signs are : 1. Aries, the Ram; 2. Taurus, the Bull; 3. Gemini, the Twins ; 4. Cancer, the Crab ; 5. Leo, the Lion ; 6. Virgo, the Virgin ; 7. Libra, the Balance; 8. Scorpio, the Scorpion; 9. Sagittarius, the Archer; 10. Capricornus, the Goat ; n.

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