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# Title: Nicolai Mercatoris Holsati, è Soc. Reg. Institutionum Astronomicarum Libri Duo, De Motu Astrorum Communi & Proprio, Secundum Hypotheses Veterum & Recentiorum præcipuas; Deqve Hypotheseon ex observatis constructione (shelfmark Leibn. Marg. 63)
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Soct. 3.
ASTRONOMTA
299
Post occasum Solis adhue conspicitur. Ouod Rigitur incer-
diu capiatur Ouadranre azimmurhali alticudo Solis, nec non
alcicudo parirer ac aximurhum Veneris; mox Figura L. XVI.
in Frianoulo P Z O dantur rria latera, 1. Z O complemen.
tum alticudinis obserracae Solis, 2. PZ complementum ele-
vationis poli, 3. PO complementum declinationis Solis
quadranre majus vel minus. Invenitur Z PO distancia Solis
a meridiano. Ruxsus in Frianoulo P Z ~ dANET L. P Z ut
ante, 2. Z E complemencum alcieudinis observarae Veneris,
2. PZ F arimuttum Veneris obserratum. Invenitur ipitur
EPE distantia Veneris a meridiano. AB angulo L. PC
anter anculum Z. P Q, rectar angulus OP P, Cive ditferentia
4
Alcen