It was due to the Jesuits that France established subventions for geographical research. In 1651 Martino Martini, kinsman of the celebrated Eusebio Kino, published his "Atlas Sinensis", which Richtoven described as "the fullest geographical description of China that we have." Kircher published his famous "China illustrata" in 1667. Verbiest was the imperial astronomer in China, and so aroused the interest of Louis XIV that he sent out six Jesuit astronomers at his own expense and equipped them with the finest instruments. One of these envoys, Gerbillon, explored the unknown regions north of China, and he, with Buvet, Régis and Jarton and others, made a survey of the Great Wall, and then mapped out the whole Chinese empire (1718). Manchuria and Mongolia as far as the Russian frontier and Tibet to the sources of the Ganges were included. The map ranks as a masterpiece even to-day. It consists of 120 sheets, and it has formed the basis of all the native maps made since then. De Halde edited all the reports sent to him by his brethren, and published them in his "Description géographique, historique, politique, physique et chronologique de l'empire de Chine et de la Tartarie chinoise." The material for the maps in this work was prepared by d'Anville, the greatest geographer of the time, but he was not a Jesuit. In addition to these works, were written fifteen volumes by the missionaries of Pekin about the history and customs of the Chinese, and published in Paris. These Jesuit astronomers and geographers were associate members of all the learned societies of Europe, and were especially serviceable to those bodies in being able to determine the longitude and latitude of the places they described. Between 1684 and 1686 they fixed the exact position of the Cape of Good Hope and of Louveau in Siam. As early as 1645 Riccioli attempted to determine the length of a degree of longitude. Similar work was done by Thoma in China, Boscovitch and Maire in the Papal States, Leisganig in Austria; Mayer in the Palatinate, and Beccaria and Canonica in northwestern Italy. Veda published the first map of the Philippines about 1734. Mezburg and Guessman made maps of Galicia and Poland, Andrian of Carinthia, and Christian Meyer of the Rhine from Basle to Mainz. Riccioli, a distinguished reformer of cartography, published his "Almagestum novum", and his "Geographia et hydrographia reformata" as early as 1661. Kircher gave the world his "Arsmagnetica" and "Mundus subterraneus" about the same time, and made the ascent of Etna and Stromboli at the risk of his life, to measure their craters. His theory of the interior of the earth was accepted by Leibniz and by the entire Neptunist school of geology. He was the first to attempt to chart the ocean currents. Heinrich Scherer of Dillingen (1620-1704) devoted his whole life to geography, and made the first orographical and hydrographical synoptic charts. Johann Jacob Hemmer was