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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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Sect. 2.
A5TRONOMTA.
2. Sgnario Temporis duabus constac partibus. Prior
excerpitur e priori Pabula parre cum vero loco Solis ade-
unda, ee minutix excerpix rempori apparenti (quale est
Observationum) adduncur vel decrahuntur secundum ciculos
in Tabuli expressos, uc tar tempus primo xequatum. P0-
lerior aurem pars aequationis tum demum acquiri porest.
cum ad rempus primo aequarum Anomaliam Solis mediam e
labulis mediorum mocuum suppucaveris, cum ista enim
anomalii media solis c posteriori Tabula aequationiscem-
Poris parte excerpes minuta ex secunda tempori primo x
quaro applicanda licur riculi ad scripri monene, ut hat cemPUS
vere Actronomicum, sive medium. Lildem vero minuris e
lecundis comperentem mocus Solis porriunculam pro corun-
dem ciculorum indicio addes vel demes medio morui longi-
cudinis pariter ac anomaliae Solis prius inventx.
2. Medii Mocus Porro ad cempus Astronomicum sup-
Durancur ex Tabula secunda modo vulsari omnibus noto,
quem proinde docere nihil attinet.
3. Aquatio Ceneri ex data anomalia media a fd efficir
veram a sd, cAque ipla procthapharelis fds conltans dua-
bus parribus fdm, e mds. Prior, parsinvenitur in Tri-
angulo fam, cujus lacera fm _ m a data sune constantis
longicudinis cum ansulo exrerno a f d Anomalixe medix
datxe; quare Md. Mf:: sin af d. Cinfdm. Subducto
tumirum 108-0 m d ex l08. omf, rectat numerus logarith-
micus constans in Latereulo primo signatus lirera A, seMPeF
addendus sinui Anomalix medix datx a fd, uc tac Sinus
Fdm. Posterior pars aequationis centri invenitur in Tri-
angulo m ds, cujus latera md e ms dara sune constans
ongicudinis cum angulo externo fm d = af d = fdm,
quare m d -)  m 5. m d - - ms :: TanS =fm d. CaHB
X LL. Subducto nimirum l09. 0 ma. (. m s cx 108.0
m d- msreltar numerus logarictimicus constans in lacerculo
Primo signatus licer a B semper addendus tangenti = f m a, uC
HaE LanBeNS Z Z L L, _C.
4. Parallaxis Orbis postulac distancium Telluris e Pla-
1
abet