‘Atlas of Modern Geography,’ the first part of which appeared in 1585, and a second part in 1590, was not completed during his lifetime, though but four months after his death, in the year 1594, Rumold Mercator published his father’s collection of maps, adding a third part to those which previously had been issued. It was this publication which bore the title ‘Atlas sive cosmographicae meditationes de fabrica mundi et fabricati figura.’ Apparently for the first time the term “atlas” had here been employed for a collection of maps, a term which we know had its origin with Gerhard Mercator himself. A reference to his general cartographical work more detailed than the above cannot here find place. It is his globes which call for special consideration. There is reason for thinking it was Nicolás Perrenot, father of Cardinal Granvella, who suggested to Mercator the construction of a globe; it at least was to this great Prime Minister of the Emperor Charles V that he dedicated his first work of this character, a terrestrial globe dated 1541.[272] That Mercator had constructed such a globe had long been known through a reference in Ghymmius’ biography, yet it had been thought, until 1868, that none of the copies of this work had come down to us. In that year there was offered for sale, in the city of Ghent, the library of M. Benoni-Verelst and among its treasures was a copy of Mercator’s engraved globe gores of the year 1541, which were acquired by the Royal Library of Brussels, where they may still be found. Soon thereafter other copies of these gores, mounted and unmounted, came to light in Paris, in Vienna, in Weimar, in Nürnberg, and later yet other copies in Italy, until at present no less than twelve copies are known. These gores were constructed to cover a sphere 41 cm. in diameter, and the map represents the entire world, with its seas, its continents, and its islands. The names of the various regions of the earth, of the several empires, and of the oceans are inscribed in Roman capital letters; the names of the kingdoms, of the provinces, of the rivers, are inscribed in cursive Italic letters, while for the names of the several peoples he employed a different form of letter. The gores, twelve in number, were engraved and printed in groups of threes (Fig. 61), each gore having an equatorial diameter of thirty degrees. Mercator worked out mathematically the problem dealing with the proper relation of the length of each of the gores to its width, or of its longer diameter to its shorter, in his endeavor to devise a map as nearly perfect as possible in shape for covering a ball, knowing full well the difficulty of fitting a flat surface to one that is curved. Each of the gores he truncated twenty degrees from the poles, and for the polar areas he prepared a circular section drawn according to the rule applicable to an equidistant polar projection. It appears, as before noted, that he was the first to apply this method in globe construction.