A grammar of modern geography, illustr. by an accompanying atlas

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Página 133 - Rule. — Find the sun's place in the ecliptic, and bring it to the meridian, and the degree which stands over it is the sun's declination.
Página 145 - ... to us upon the earth. Digit. One twelfth part of the sun or moon's surface. In a total eclipse of these luminaries the whole disk is obscured : in a partial eclipse only one or more parts, called digits. Emersion. When the sun, moon, or star, begins to appear after an eclipse. Epact. The eleven days which the solar year contains more than the lunar one. Elongation. The greatest distance at which any inferior planet is seen from the sun. Geocentric Place. The appearance of a planet as seen from...
Página 142 - Then turn the globe till the given body comes to the eastern part of the horizon ; and the index will show the time of its rising: bring the body to the meridian, and the index shows the time of its culmination or southing; bring it to the western horizon, and you have the time of its setting.
Página 147 - Phases of the Moon. Its different appearances according to the quarter it is in. Perihelion. That part of a planet's orbit in which it is nearest the sun. Perigee. That part of a planet's orbit in which it is nearest the earth.
Página 135 - X.) and bring it to the meridian, and set the index to 12 ; bring the sun's place to the eastern edge of the horizon, and the index will show the hour of rising ; bring it to the western edge of the horizon, and the index will show the hour of setting.
Página 135 - Rectify for the latitude and sun's place, (Prob. vm ) and turn the sun's place to the eastern edge of the horizon, and the index will point to the hour of rising : then bring it to the western edge of the horizon...
Página 136 - X. — To find the Length of the Day and Night at any Time of the Year.
Página 136 - Time in the Year. Double the time of the sun's rising, which gives the length of th'e night ; double the time of his setting, which gives the length of the day.
Página 132 - Otaheite ? — between Mecca and Calcutta? PROBLEM vi. To find the Distance of any two Places on the Globe. Lay the graduated edge of the quadrant of altitude over both places, and the degrees between them, multiplied"by 69J, will give the distance in English miles.
Página 143 - ... To rectify the globe for the latitude, zenith, and sun's place on any day. 1. FOR THE LATITUDE. Elevate the pole till the horizon cuts the brass meridian in the degree corresponding to the latitude of the place. 2. The given place is then in the zenith. 3. Then (by Problem X.) find the sun's place for the given day, bring it to the meridian, and set the index to 12. Note. If the place be in north latitude, elevate the north pole, if in south latitude, elevate the south pole.

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