[132] Zedler, J. H. Groses universallexikon aller Wissenschaften und Kunste. Leipzig-Halle, 1745. Vol. 46, p. 153; Günther, Erd- und Himmelsgloben, p. 107, n. 1, reports that two of his Atlases, one of which is a particularly fine example of work representing astronomical geography, may be found in the K. Hof und Staatsbibliothek of München. More than one hundred and twenty-five maps of Gerhard and Leonhard Valk are listed by Phillips in his excellent work on Atlases in the Library of Congress. See index. [133] Praxis astronomiae utrisque ut et geographiae exercita per usum Globi coelestis et terrestris tum et Planetolabii. Amstelodami, sumptibus Gerhardi Valk Calcographi apud quem prostant una globis et Planetolabio. n. d. [134] There is considerable doubt as to the date assigned to the Valk globes in the Königliche Museum of Cassel, and to those in the Germanisches Nationalmuseum of Nürnberg. See reference to these above, p. 150. [135] “Senex, John,” with appended short bibliographical list. (In: Dictionary of National Biography.) [136] See reference below, Chap. XIII, to Adams. [137] “Bion, Nicolas,” with portrait. (In: Nouvelle biographie. Paris, 1853.) [138] Bion, Nicolas. Usage des globes célestes et terrestres, et des sphères, suivant les différents systèmes du monde. Paris, 1699. This work was reissued no less than six times before 1751, there being added to the title in the sixth edition, “Précédé d’un Traité de Cosmographie. Sixième édition, revue et corrigée par le Sieur N. Bion, ingénieur du Roi pour les instruments de Mathématique, sur le Quai de l’Orloge du Palais, au Soleil d’or, où trouvé des Sphères et des Globes de toutes façons”; same author. Traité de la construction et des principaux usages des instruments de mathématique. Paris, 1752. Bion’s work was translated into English by Edward Stone and published in London, 1723, under the title ‘Bion’s construction and principal use of mathematical instruments.’ [139] See p. 142. [140] Fiorini, op. cit., pp. 402-405. [141] Fiorini, op. cit., pp. 430-431. [142] “Seutter, Mattheus.” (In: Allgemeine deutsche Biographie.); Sandler, C. Mattheus Seuter und seine Landkarten. (In: Mitteilungen des Vereins für Erdkunde zu Leipzig. Leipzig, 1894. pp. 5-38.) This article contains a brief biography, a list of his several map publications, his colaborers, and a special consideration of his landkarten. [143] See the list as given by Sandler, op. cit. [144] “Morden, Robert.” (In: Dictionary of National Biography.) [145] Morden, R. An introduction to astronomy, geography, navigation, etc., made easy by the description and uses of the coelestial and terrestrial globes, in seven parts. London, 1702. A list of his maps and principal geographical works is given in the article referred to in note 28. See also British Museum Catalogue of Printed Books and Maps.