Vossius tells us that in addition to terrestrial and celestial globes, Blaeu also made a planetarium and a tellurium. In the first, the sun is placed in the center of the system, about which revolve Venus, the Earth and the Moon, Mars and Jupiter. The second represents the double motion of the Earth, that is, its daily rotation and its annual revolution. He remarks that nothing like it has been seen since the time of Archimedes. Blaeu himself refers to these instruments in his work first issued probably in 1620 with the title, “Tweevoudigh onderwys van de Hemelsche en Aerdsche Globen,” as of value for the study of cosmography. In connection with his description of them, he interestingly observes that the celestial heavens are at least 20,000 times greater in diameter than is the circle of the terrestrial globe’s course, and this in his planetarium is 2½ inches. He adds that the diameter of the terrestrial globe’s course is 1142 times the celestial globe’s diameter. A very considerable number of his globes, doubtless constructed subsequent to 1622, can now be located, though at the time of writing his biography in 1872, Baudet could find trace of but five or six, including those of earlier date. In a searching study of the history of early globes, it may here be stated that the author of this monograph has now been able to locate no less than sixty Blaeu globes. WORLD MAP OF 1605 Among the treasures of The Hispanic Society of America may be found a unique copy of Willem Janszoon Blaeu’s engraved World Map in two large hemispheres, issued in the year 1605. Stretching across its upper border is the title, “NOVA UNIVERSI TERRARUM ORBIS MAPPA EX OPTIMIS QUIBUSQUE GEOGRAPHICIS HYDROGRAPHICISQUE TABULIS SUMMÂ INDUSTRIÂ ACCURATISSIMÈ DELINEATA, DUOBUS PLANISPHERIIS GRAPHICÈ DEPICTA À GULIEL JANSSONIO ALCMAR,” a title which in its special arrangement and in the form of its letters strikingly recalls the World Map of Jodocus Hondius of the year 1611, which, with Professor Joseph Fischer, the editor of this World Map of Blaeu recently issued in facsimile.[37] Here is a second fine example of Holland’s contribution to the cartography of a period particularly rich in this field of geography. Mounted on the coarse linen so frequently used for such purposes at that early day, and attached to a rough wooden frame, it is not a little surprising that it should have come down to us through these many years. The old mounting has not been disturbed for this reproduction, and with all of its suggestions of age, it hangs on the walls of The Hispanic Society’s Museum amidst other rich cartographical material of the period.