A classical atlas, to illustrate ancient geography : comprised in twenty-five maps, showing the various divisions of the world as known to the ancients, composed from the most authentic sources : with an index of the ancient and modern names . litical importance of these in different ages, they will be sufficient to elucidate each other. The positions in this Ancient Atlas are given according to the situation of the places in the maps ;and the longitudes are reckoned east and west of the meridian of Greenwich. The difference oflongitude, and the mode of ascertaining it, are described in the In
A classical atlas, to illustrate ancient geography : comprised in twenty-five maps, showing the various divisions of the world as known to the ancients, composed from the most authentic sources : with an index of the ancient and modern names . litical importance of these in different ages, they will be sufficient to elucidate each other. The positions in this Ancient Atlas are given according to the situation of the places in the maps ;and the longitudes are reckoned east and west of the meridian of Greenwich. The difference oflongitude, and the mode of ascertaining it, are described in the Introduction to the Modern Atlas. The ancient first meridian was the longitude of Ferro, or Hierro, the westernmost of the FortunateIsles, the present Canaries. This is 18 degrees west of Greenwich (strictly 18° 10). Therefore,where the place is east of Greenwich, by adding 18 degrees to the longitude, will give that from Ferro:thus, Rome (Map IV.) is in longitude 12° 27 E.; increased 18°, gives 30° 27 for the longitude fromFerro. But if the longitude is west of Greenwich, it must be subtracted from 18° : thus SacrumProm., Cape St. Vincent, in Spain, (Map XVI.), is 8° 59 west, which, taken from 18°, is 9° 1 lon-gitude from Ferro,. LOKDOH PUBLISHED BY W. TEGG S
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Keywords: ., bookcentury1800, bookdecade1850, booksubjectgeographyancient, map
