Reinhold & Roll ~ 1586
"The globe clock of 1586
was designed by Johannes Reinhold and Georg Roll of Augsburg. It is
made of brass and copper covered with gold leaf, and is 56.5 cm high
with a diameter of 20.5 cm. It contains a small terrestrial sphere
below a large celestial sphere, all crowned by a small armillary
sphere and surrounded by a movable calendar ring. The celestial sphere
depicts 49 constellations."
Robin Cook, Loc cit.
Weigel ~ 1690
The heraldic celestial
globe of 1690 was designed by Erhard Weigel, a mathematics professor
from Jena. it is 59cm high with a diamer to 27.5 cm, and is made of
brass covered with copper foil. It contains a system of rings
representing the equator, a meridian, the tropics of Cancer and
Capricorn, and other circles. Replacing the ususal Ptolemaic
constellations are the coat-of-arms of Saxony and other heraldic
Robin J. Wilson,
Stamping Through Mathematics,
New York: Springer, 2001, p. 40.