Image:EB1711 Armillary Sphere.png

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The components of the armillary sphere are labeled.

A 
equinoctial ring, showing the sun's ascension
b 
north pole nut holding sun Ψ
B 
ecliptic ring, showing location of the sun on a specific day of a month
C 
tropic of Cancer
d 
pin holding moon Ζ
D 
tropic of Capricorn
e 
where tropic of Cancer touches ecliptic
E 
arctic circle
f 
where tropic of Capricorn touches ecliptic
F 
antarctic circle
G 
equinoctial colure
H 
solstitial colure
J 
terrestrial globe
K 
terrestrial axis
L 
flat celestial meridian
M 
movable horizon
n 
terrestrial north pole
N 
celestial north pole
N 
pedestal
O 
joint
P 
arc of joint O (0 to 90 degrees)
Q 
brass arm
r 
elevation screw
R 
upright piece
s 
terrestrial south pole
S 
celestial south pole
T 
box
U 
1st of 2 axes of wheels for T (earth turns)
V 
2nd of 2 axes of wheels for T (sphere of circles turns)
W 
winch
Ψ 
sun
Ζ 
moon

[edit] Summary

Description

Armillary sphere, from Plate LXXVII
Source

Encyclopedia Britannica
Date

1771
Author
This media is lacking author information.
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Believe the author of this may have been a Frearson, or Frearson Brothers of Norseman, Dundas, Western Australia who had the first newspaper there. Also had newspaper in King Street, Adelaide where other family operated doing maps. Some brothers moved to Norseman 1890's and settled there some 18 years. Septimus Frearson was a Councillor of the Shire of Dundas at the time of proposed recession with newspaper articles related to visit by Premier John Forrest.
Permission
(Reusing this image)

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Public domain This image comes from the 12th edition of the Encyclopædia Britannica or earlier. The copyrights for that book have expired and this image is in the public domain.

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current06:50, 13 November 20062,096×3,092 (3.38 MB)SEWilco ({{Information |Description=Armillary sphere, from Plate LXXVII |Source=Encyclopedia Britannica |Date=1771 }})
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