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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)
# Folio 154, page id 820424455:0176
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Lib. IL
23
ASTRONOMIA
IIam f+ = a 5 .). p5
FC f5 = a5 - p5
Der V
Der s
FEca frest anomalia media, qui Angulus, cum sIE externs
angulo sfF, sequalis est duobus incernus _ oppolIS
_fst, hoc est angulus a fr eAt Z. LLignororum f
_ fst,
Acqui per Regulam Trigonometricam:
ZII. XI:: 1=L LL. 1= X LL, hoc est,
f1)f5. ft- f5:: FE AnB. aft. 1= X L f158f51)
Hoc est per incerpretarionem
2 a5. 2p5:: tE Anguli afr. += Anguli fse
: Nam fF = a 5.  Ps per V adde primum, e
Et
f5 = a5 - ps per SG Tubirate, EC
2. = f1 1 f5 = 2a5
 = ft - f5 = 2 P5, CrBO
22. = a5, 
2X = p5.
RurTUS Z Lfst _ f15 = f5+ - f15
ec pro fts substruendo est, fE
X
=fst - cst = fse,
ErBO +ZZ L L. = t= Anguli fse
treo etiam = ZI. EXII :: tEI LL.
Id est Der E
a5. p5:: 1 Anguli aft. + Z Anouli fse,
Regula perpetua pro prima insequalitate Planerarum inreta
Sanda. Enunciatur aurem verbis SIC: Ut distancia Planela
aphelios, ad distantium perihetion; ita cansens dimicta
anomalix medix, ad tangercem dimidix anomalix COxqual2.
Ec quoniam distancia Planieta ram aphelios quam peritetio
conttancer est eadem, liquer quod priores duo termini pro
polux aralosix semper linc iidem, nimirum in Sole, V. Gr.
L0g. us distantix maximx relluris 4300775
L08. us distantia minimX 3, 99216
1.
Unde per Regulam proporcionum: Diriso secundo
DrimuIB,