An Easy Grammar of Geography: For the Use of Schools, Upon Goldsmith's Much Approved Plan

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P. Potter, 1815 - 200 páginas

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Página 122 - Rule. If the places are in the same hemisphere, bring each to the meridian, and subtract the latitude of the one from that of the other; if in different hemispheres, add the latitude of the one to that of the other, and the sum will show the difference of latitude.
Página 135 - ... proportion as it recedes from the sides of the former conical shadow : this is called the penumbra. As the moon revolves round the earth, sufficiently near to pass through the shadow of the earth, an eclipse must always take place when these three are all in one straight line.
Página 127 - 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. Then turn the globe from west to east, and to all the places that pass under that degree will the sun be vertical on that day. Ex. — Thus, on the 27th of October, the sun's declination will be 13° 18' south ; and he will be vertical at St.
Página 125 - For the latitude : elevate the pole above the horizon, according to the latitude of the place. 2. For the zenith : Screw the quadrant of altitude on the meridian at the given degree of latitude, counting from the equator towards the elevated pole.
Página 147 - Rectify the globe to the latitude of the place ; bring the sun's place in the ecliptic to the meridian, and set the index to 12. Then turn the globe till the given body comes to the eastern part of the horizon ; and the index will show the...
Página 9 - The latitude of places upon maps is expressed by the figures which run up and down the sides. If the figures increase upward, the latitude is north ; if they increase downward, the latitude is south.
Página 124 - T of the hour circle to that hour ; then turn the globe till the proposed place comes under the meridian, and the index will point to the present hour at that place.
Página 77 - It is divided into two great governments ; that of Tobolsk in the west, and Irkutsk, in the east. The principal city is Astracan, besides which are Tobolsk and Irkutsk.
Página 124 - Thus, when it is twelve o'clock at noon in London it is nearly four in the afternoon at the island of Mauritius ; but at Jamaica, it is only about seven in the morning.
Página 143 - As the terrestrial globe, by turning on its axis, represents the real diurnal motion of the earth, so the celestial globe, by turning on its axis, represents the apparent motion of the heavens.

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