A fine example of the metal worker’s art of this period may be found in a silvered bronze celestial globe (Fig. 73) belonging to the Morgan collection recently placed in the Metropolitan Museum of New York. On the meridian circle we find the maker and date legend reading “Gerhard Emmoser, sac. caes. meis horologiarius, F. Viennae 1579.” The sphere, which can be opened on the line of the ecliptic, has a diameter of about 13 cm. Within has been placed a delicately constructed mechanism by means of which the sphere is made to rotate once in twenty-four hours on its equatorial axis, the key winding stem for this machinery projecting at the north pole through an engraved hour plate with pointer. With its meridian and its horizon circle it is adjusted to make one revolution in three hundred and sixty-five days. A stationary ring, about 2 cm. in width, which closely surrounds the horizon circle and in its same plane, fits the instrument as a calendar. This ring has engraved on its surface crossing lines, one for each day of the year, to each month there being assigned its proper number of days or lines, as, for example, “October habet 31 dies,” “November habet 30 dies.” As the sphere with its circles revolves, a pointer attached to the horizon circle indicates on the calendar ring each day of each month in succession. The surface of the sphere is exquisitely engraved with representations of the several constellations, the name of each being given in Latin. The instrument is made to rest upon the back of a winged horse in silvered bronze, this in turn standing upon an artistic circle base. It is well preserved and is a choice example of such instruments, which in this period were in particular favor. [Illustration: Fig. 73. Silver-Gilt Globe of Gerhard Emmoser, 1573.]