Full text: de Sacrobosco, Johannes: Sphaera Ioannis de Sacro Bosco emendata

SPHAERAE IOAN. cùm ſint maximi circuli in ſphæra, interſeca-
bunt ſe in partes æquales. Vnde ſtatim medie-
t{as} vna zodiaci emergit ſupra horizontem, &
reliqua deprimitur ſub horizonte ſubitò. Et
hoc eſt quod dicit Alfragan{us}, quòd tibi occi-
dunt repentè ſex ſigna, & reliqua ſex oriuntur
toto æquinoctiali. Cùm etiam ecliptica ſit hori-

zon illorum, erit tropic{us} Cancri tot{us} ſupra

horizonta, & totus tropic{us} Capricorni ſub ho-
rizonte: & ſic Sole existente in primo puncto
Cancri, erit illis vna dies 24. horarum, &
quaſi inſtans pro nocte, quia in inſtanti Sol
tranſit horizonta, & ſtatim emergit, & ille
contactus eſt illis pro nocte. E conuerſo contin-
git illis Sole existente in primo puncto Capri-
corni. Est enim tunc illis vna nox 24. horarum,
& quaſi inſtans pro die.

52.1.

f
Diff. 7.

Illis autem, quorum zenith eſt inter cir-
culum arcticum & polum mundi arcticum,
contingit, quòd hori-
zon illorum interſe-
cat zodiacum in duo-
bus punctis æquidi-
ſtantibus à principio
Cancri, & in reuo-
lutione firmamenti
contingit, quòd illa

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