A third globe of gilded brass, containing clockwork within by means of which it is made to revolve and apparently the work of Bürgi, may also be found in this Cassel collection. A small silver sun, movable along the equator, is mechanically attached in such manner as to serve admirably for demonstrative purposes. The engraved surface of the globe is equal in its artistic merits to that of the copper globe referred to above. There is yet a fourth metal globe in this collection, apparently the work of Bürgi, which is not gilded. In other respects it is said to resemble the one designated above as the third globe. Kepler is said to have held in the highest esteem the scientific work of Bürgi, and to have placed him, within his field, as high as he did Albrecht Dürer among artists. There appears to be good reason for attributing the invention of the pendulum clock to Jost Bürgi, and that before 1600 he had proved this method of clock regulation practical. Among the numerous and interesting treasures to be found in the Landesmuseum of Zürich is a terrestrial globe (Fig. 80) having neither name of maker nor date of construction, but belonging, undoubtedly, to the late sixteenth century.[366] The sphere has a diameter of about 121 cm., is mounted on a substantial wooden base, and appears to have been made for the monastery of St. Gall, from which place it was taken to Zürich in the year 1712. On the semicircular arms which support the equatorial circle are represented the armorial bearings of the abbey and monks of St. Gall, and the date in gold, 1595, which may refer to the date of construction or to the date when it was placed in the monastery. On the equatorial circle one finds represented the signs of the zodiac, the calendar, the names of the saints and of the winds. On the heavy meridian circle are indicated the climatic zones and the degrees of latitude. The prime meridian is made to pass through the Azores Islands. The sphere is of papier-mâché and plaster, on which the engraved gores are mounted. The seas have been colored green, the lands a dull yellow, the mountain ranges brown. Numerous barbaric kings are represented in picture, likewise numerous animals of land and sea, and ships artistically drawn sail hither and thither over the oceans. The austral continent is wanting. Marcel especially notes the striking resemblance of the globe map to the Mercator map of 1569, suggesting the possibility of its Mercatorian origin, in support of which suggestion he quotes a number of geographical names as well as certain legends. The globe, it appears, has never been critically studied, but is clearly an interesting geographical monument of the period. [Illustration: Fig. 80. Anonymous Terrestrial Globe, ca. 1595.]