' ^ an 
ie ^sserva- 
Istitlitft A\ 
eca S. Sco- 
!0 Machia- 
0 rti n, each 
'“ventodei 
Comunale 
Novi. 
N exam- 
armillary 
1 circles 
is without 
? ear 1780. 
ription “A 
s example 
circle 31 
se by four 
elve gores 
'Utline the 
Its armil- 
; meridian 
can be re 
nal globe, 
surface of 
ircles, the 
hour cir- 
1 as not to 
the mend- 
the one of 
nathemat- 
jrge III of 
Fig. 129. Armillary Sphere of Jean Fortin, 1780.