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 — John Shaqi
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
since nearly all regions have been described as navigators, in their
voyages, found the direction from one to another, of any two places,
without reckoning having been taken from a third place, or account
having been taken of the variation of the nautical needle, or even of
nautical direction, which they indefinitely make use of, although in one
place the needle does not point exactly as in another, being deflected
more or less from the true north according to the usage of the country
in which the compass card employed was made, and thus the longitude of
places is made to vary. Many have tried in vain to eliminate these
errors by the polar stars. Others have tried to do the same by noting
the course of the moon, and others again, with more certainty, by
observations of eclipses; but all this is with much labor, and who will
be able thus to get an accurate observation? But now since the longitude
of places has been sought through the variation or deviation of the
needle, as they say, I thought it would be a work of merit if I noted on
this globe all the regions (at least all whose longitude is known) each
with its own degree of longitude although knowing this would be no
little labor. We have begun our reckoning of longitude not from the
Fortunate Islands, as did Ptolemy, but from those which are called the
Azores, because there the nautical needle points directly to the north.
Farewell. In the year 1601.”
These globes of 1601 are composed of a hollow wooden shell, over which
have been pasted the twelve engraved gores. They are mounted on
well-constructed bases of copper from which rise the supports for the
horizon circle, on the surface of which are the usual graduations, the
calendar and zodiacal representations. The meridian circles are of
brass, are graduated, and have in addition the engraved designations
“Zona torrida,” “Zona temperata,” “Zona frigida.” An example of each of
these globes of 1601 may be found in the Museo Municipale of Milan, and
one of the celestial globes in the library of the Seminario Vescovile of
Rimini.
Public-domain text, read in full here on John Shaqi.
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