Terrestrial and Celestial Globes Volume 2: Their History and Construction Including a Consideration of their Value as Aids in the Study of Geography and AstronomyStevenson, Edward Luther
History
Terrestrial and Celestial Globes Volume 2: Their History and Construction Including a Consideration of their Value as Aids in the Study of Geography and Astronomy
Stevenson, Edward Luther
Geography -- History; Globes
In addition to the examples of Valk globes referred to above as
belonging to the University of Ghent and to The Hispanic Society of
America, a pair may be found in the Königliches Museum of Cassel, said
by Gerland to be dated 1715, and to have each a diameter of 45 cm., also
a terrestrial globe in the same museum said to be dated, though
doubtless erroneously, 1700, and to have a diameter of 23 cm., also a
celestial globe of the same date having a diameter of 30 cm. In the
Mathematische Salon of Dresden is a celestial globe having a diameter of
30 cm., and a pair in the Museo di Fisica of Bologna, the diameter of
each being about 46 cm. The date has not been ascertained. In the
Germanisches Nationalmuseum of Nürnberg may be found a well-preserved
pair of the Valk globes said to be dated 1700 and to have each a
diameter of 31 cm.
[Illustration: Fig. 121a. Celestial Globe of Gerhard and Leonhard Valk,
1750 (?).]
John Senex, a noted English cartographer and engraver (d. 1749),[135]
appears to have given some attention to the construction of globes,
which were sold at his establishment in Salisbury Court, London. In
the year 1714 we find his name associated with that of John Maxwell in
the issue of ‘The English Atlas,’ and in 1721 he appears as the editor
of ‘A New General Atlas.’ It was in the year 1720 that he made a
representation to the House of Commons on the subject of “A New Globular
Projection,” with the thought of eliciting encouragement for the
employment of better methods in map construction. He became a Fellow of
the Royal Society in 1728, and in 1738 read before that society a noted
paper on his “Contrivance to make the Poles of the Diurnal Motion in a
Celestial Globe pass round the Poles of the Ecliptic.” This globe was to
be “so adjusted as to exhibit not only the risings and the settings of
the stars in all ages and in all latitudes, but the other phenomena
likewise, that depend upon the motion of the diurnal axis round the
annual axis.” From what is stated in this paper one is led to associate
his idea with that of Cassini, to which attention was directed above.
If, however, such a globe was constructed as that referred to in this
scientific address it is not now known. Five of his globes have been
located, two of them undated, and three of them dated 1793, which, if
the correct date of issue, it will be noted, is more than fifty years
after his death. A pair of his globes may be found in the Bibliothèque
Nationale of Paris undated. These are reported as having a diameter of
about 40 cm. They are furnished with brass meridian circles, with
horizon circles of wood, and each with a wooden base. The dedication
reads: “Philosopho ac Geometrae summo Dᵒ Isaaco Newton, equiti, Regalis
Societatis Londini, ad scientias promovendas institutae, Praesidi
dignissimo, ejusdemque consilio et sodalibus hos Globos qua par est
humilitate D.D. C. Johannes Senex. London.” “To the great philosopher
Public-domain text, read in full here on John Shaqi.
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