Russian Armillary sphere, 1960
Diameter: 50 cm
Total height: 60 cm.
Armillary sphere. The primary sphere of 40.5cm diameter consists of six metal rings,
two are fixed perpendicular to each other and represent the colures.
Three parallel rings (painted blue) are fixed perpedicular to the
colures and represent the tropics and the graduated equator (division
The sixth ring (painted yellow) represents the zodiac; it is marked with
a Gregorian calendar (division in months) and with the Russian names of
the months. The zodiac starts with respect to the calendar scale. The
primary sphere is mounted on a polar axis. At the mid-point of this
axis, there is a wooden sphere with a slot for holding a horizon disc
(diameter 35cm). The disc is graduated (divisions 15 degrees) and the
four main compass points are indicated by the Russian initials. The
polar axis is mounted in a meridian ring consisting of two semicircles,
one of which is thin and flat, whereas the other has a square profile
and is graduated. Between the primary sphere and the meridian ring,
there is a movable metal semicircle fixed to the poles. A small yellow
wooden sphere acts as a sliding indicator. There is also an hour circle.
Attached to the meridian ring, there is a graduated altitude quadrant
with a yellow star as a sliding indicator. The sphere with its meridian
ring is sustained by a metal arm attached to the pillar of a metal
tripod stand. (Globes at Greenwhich, Elly Dekker).
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