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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 279, page id 820424455:0301
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AAPPENDEX.
mensibus reverri ad eandem phasin; quemadmodum illa in
Collo Ceti revolurionem suam ab solvir undecim mensibus.
Praecerea commemorat idem Diarium, plures sellas à
CI. Castini obserratas in Caltiopea, in Fridano, e circa
Dolum Arcticum, quarrae, quineae de sexexe magnicudinis,
enoras prioribus Astronomis; alias vero prius visas, nunc
disparuisse; quasdlam minuriores apparere nunc, quam olim.
Sed _ CI. Moncanari, Prosessor Machemarum Bononia,
lireris ad Socierarem Regiam daris Apr. 30, 2670. Sic seribir 2
Multa possem certe nova de Ccelo robistradere, quae a multis
annis observo, atqne Firmamento meo Instabili exornando,
ac propediem evulcando suppeditavero; sed unum, quod
caereris admirabilius est, proferam. Desunt in caelo duae Stella
Secundae Magnieudinis in Puppi Navis eju sque Transtris,
BaVerO B C5 v. prope Canem majorem, à me e aliis,
occasione praeserrim Cometae A. 2664. observatae e recognita.
Earum disparitionem cui Anno debeam, non novi; boc indu-
bium, quod à dic 20 Apr. 1668. ne vesticium quidem illa
rum adesse amplius observoz cateris circa eas, etiam guarte
es quintaemaenitudinis, immoris. Plura de aliarum stella-
rum mucationibus, plusquam centenis, at non tanti ponderis,
annotavi, 56.
Secunde, De Maculis Solis, es rotatione ejus circa axem
snum. AnnO 167T. AuG. 3. A. n. obserrarae lune maculae
in Sole a CI. Picardo in Mari excubanre prope Insulam
Foxet, nec non Hamburgi d. 7, 8, 9 Aug. A. n. lcem
Parilsis a CI. Ca(Hni d. F1, 12, 23 Aug. Oua de reDia-
rium Parisiensium sc habet: Apparens velociras macula-
rum, cum cenero appropinquarent, ansam praebuit deter-
minandae rerolurioni carum periodiex cirea Arem Solis die
bus viginci seprem cum dimidio absolvendae, supponendo,
quod superficiei Solis adhaereane, vel cerre non longe ab ea
distene; ideoque à luce macurina diei. 13 AuB. cum essent
prope cenrrum, dies complendos ex vel septem, donec ad
limbum ejus apparenrem appellerene, quod sublequentibus
oblerrationibus comprobarum fuir. Nam à mane diei +3