The Emperor Charles V, when in Pavia, we are told, had his attention directed to an armillary sphere constructed by Dondi in the fourteenth century. On finding this sphere much injured by rust and usage he called upon Giovanni Gianelli to restore it, but it was reported to be beyond repair. Thereupon the Emperor gave direction to have the sphere reproduced, which, when completed, was carried by His Majesty to Spain. No trace of this work by Gianelli can now be found. Girolamo Fracastoro, a distinguished Italian physician, a famous man of letters, and a great philosopher of the first half of the sixteenth century, was also a skilful globe maker, as we learn from Ramusio,[286] and from the sketch of his life which usually appears as an introduction to his collected works.[287] Vasari also gives us certain information concerning him, noting that he assisted Francesco dai Libri in the construction of his large globe,[288] and we are led to believe that he was often consulted as an expert by globe makers of his day. While none of those he may have constructed are extant, what is known of his interest in these aids to geographical and astronomical studies entitles him here to a word of reference. Ramusio says[289] that on the occasion of a visit, with the architect Michele S. Micheli, to the home of their common friend, Girolamo Fracastoro, at Caffi, they found him in the company of a gentleman, a very distinguished philosopher and mathematician, who was showing him an instrument based on a newly found movement of the heavens; that after they had considered for some time this new movement, they had brought before them a large and very detailed globe of the entire world, and about this the distinguished gentleman began to speak. Fiorini argues, somewhat ingeniously, that this globe may have been one constructed by Mercator in 1541, if not one by Libri, in the making of which Fracastoro himself had assisted. The letters of Fracastoro assure us that he made use of globes in his geographical and astronomical studies, and that his friends did likewise. January 25, 1533, he wrote Ramusio, “If you should chance to speak to that master who made your metal spheres, I should like you to ascertain how much a simple but perfect one, one foot in diameter, would cost.” Writing again to Ramusio January 10, 1534, concerning the “Southern Cross,” he adds: “Just reflect a little, and if you have not sent away the celestial globe, look at that Centaurus and you will find all that I am writing to you. You might perhaps write about these doubts to Mr. Oviedo, or perhaps I might; it would be a good idea and we might ask him about the very prominent star in the right foot to ascertain whether it is a separate star or is one of those in the ‘Southern Cross.’” On the twenty-fifth of January, 1548, he again wrote to Ramusio: “On my globe Zeilan is just below the Cape of Calicut, on the equinoctial line, and it may be that which Jambolo discovered was