[23] Pictures of these instruments may be found in Le grand Atlas.
[24] Kepler, J. Astronomia nova ... De Motibus Stellae Martis. Prague, 1609; Allgemeine deutsche Biographie, “Kepler, Johann”; Wolf, Geschichte der Astronomie, pp. 281-310.
[25] In his earliest maps and charts Blaeu clearly had as his main purpose that of being of service to navigators.
[26] Blaeu, J. Le grand Atlas ou Cosmographie Blaviane. Amsterdam, 1663-1671. 12 Vols. Practically the same work in the Latin, the Dutch, and the Spanish languages. A bibliographical list of Blaeu’s principal geographical publications is given in Stevenson, op. cit., pp. 65-67, in Phillips, op. cit., and in Tiele, op. cit.
[27] Stevenson, op. cit., p. 25.
[28] Génard, P. M. N. J. Les globes de Guillaume Blaeu. (In: Bulletin Société Géographie d’Anvers. Anvers, 1883. Vol. VIII, pp. 159-160.); Baudet, op. cit., pp. 35-52; Stevenson, op. cit., pp. 15, 43-50.
[29] The Mercator globe has a diameter of 41 cm. and the Van Langren a diameter of 32 cm.
[30] Fiorini, op. cit., p. 242.
[31] Baumgärtner, J. Zwei alte Globen von Blaeu. Erdkugel von 1599 und Himmel-Globis von 1603. (In: Das Ausland. Stuttgart, 1885. No. 15, pp. 299-300.)