Rigobert Bonne (1727-1794), a distinguished French hydrographer and engineer, achieved likewise a very considerable reputation as a geographer and cartographer; indeed, the great majority of his scientific publications were within the field of geography.[171] With Joseph Jérôme Le Français de Lalande (1732-1807), one of the most famous of French astronomers,[172] he undertook the construction of a terrestrial and a celestial globe on which it was proposed to record in particular all of the most recent discoveries in both the field of geography and that of astronomy. To these globes they gave a diameter of about 31 cm., following, in constructing the gore maps with which each sphere was covered, the method of Bion, giving very careful consideration to the fact that the paper on which the maps were printed would expand somewhat unevenly when moistened with the paste used in the mounting. It seems probable that Bonne completed the terrestrial globe about the year 1771, and Lalande the celestial about the year 1775, and that the engraving of the maps was entrusted to Lattré, who had at this time a place of marked distinction in the profession he represented. Lalande says of the first issue of their work: “M. Lattré, Graveur ordinaire de Mgr. le Dauphin et de M. le Duc d’Orleans, publiera vers la fin de cette année 1771, deux globes d’un pied de diamètre, faites avec le plus grand soin, et sur les observations les plus récentes dessines avec une nouvelle exactitude; M. Bonne s’est chargé du globe terrestre, et je suis occupé actuellement du globe céleste. Ces globes seront en même temps réduits à 8 pouces et à six; chaque assortissement aura des sphères du même diamètre. Les prix seront annoncés dans les journaux.” A short time later these globe makers issued a publication in which they especially described their work, and Lalande noted in his ‘Bibliographie astronomique’ under the year 1775: “On trouve dans le Globe céleste toutes les étoiles alors connues, toutes les constellations nouvelles de la Caille, celle que j’avais introduite sous le nom de Messier, et toutes les découvertes géographiques obtenues depuis quelques années par plusieurs voyages autour du monde. On trouve ces globes chez Lamarche, rue du Foin.” While it has not been possible to locate a pair of the first edition of these globes, there may be found in the Osservatorio Astronomico of Palermo an undated terrestrial globe by Bonne and a celestial, clearly intended as a companion piece, dated 1779. In all probability they are but reprints of the first edition, having the same diameters, that is, about 31 cm. Each is furnished with a graduated horizon circle of wood, a graduated horizon circle of brass, and a small brass hour circle marked from I to XII, the whole being supported by three turned columns. They are reported as being well preserved. A pair has likewise been located in the Geographisches Institut of Göttingen.