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% 56 A New Hiftorical Relation Tome II.
Pi. Tixtrema aU Pegafi* r 4 1
J$uei* Jn [inifir0. brAckioJlxidrwed T . 3Z
Lett. Sequins in a ornu attftr. Aritu T 48 46
Gnejf. Infemore Arietisa . tf II 46
Mao. Occid. trium lucid, in Pleiad. tf 23 37
Pie. Qculns Tauri Barcus. JA I 16
Sang* / Recedens Balthei Oriehtis- H , 17 14
Cu. In extremo cornu auftr. Tauri jr 19 i?
CV f. Pes fequens praced. Gemini , ^ a 7
Bore^prand c. in quad. lat.[A !anc. 0 33
Lieu. Septentrion. in roUro Carte; si s 3A
Sing. Cor Hydr e SI 22 9
Chang. ' In medio corpore Virginis a vz 0 *7
7e. In kfifi Crateris. vz 18
Chin. TertTa in ala auftrina Virg. -TV. 4. S9
This agreement of the numbers of thef? Tables with thofe qf Tycho, almoft in the fame minace, gave me ground to.-imagiae that thefe Tables have been calculated by the^jWftsr, who went about an Age fince to China, and roc by the Chinefes. For what probability is there, that without being drawn-from Tychos Tables they (hould be fo conformable thereto ?Out Aftronomers of this Age find difficulty to agree in the fame minute in the place of the fixed Stars: and it is known that between the Catalogues of Tycho, ane that of the ZW* grave of tJejfc, made at the, fame time by excellent Aftronomers, there is a difference.of feveral minutes. Wherefore it is not very probable that the Obfervations of the Chinefes, (hould agree almoft always with the Obfervations of Tycho in the fanaeminute.
V. The, Method of terminating the Chinefe Conftellations at any time. -a f
f a ,
Fhthti;. Mart inns remarks, that the Chinefes do determine the Longitude in the Heaven by the Poles of the World *, that is to fay by great Circles drawn threugh die Poles perpendicular to the Equinoxial, where we denote the right afcenfions ofthe Stars. Therefore the (tars which are between two Circles, that do pafs through the Poles, and through the two fixed Stars which terminate a conftellation, relate to that very conftellation.
a vBat.k aspeaxs .bErtee tongi*.
tildes are A Qt. dgwn differently io -the-Table of Fa$e,r QUi what
they are noted id Tycho's Tabfc, which reduces-the Stars to the Ecliptic k, and not to the Equinoxial. They are not therefore fet doweafter the Chmfi manner; but to reduce them after the Chinefe method, it is neceffary to refer the Stars which are,at the beginning of every conftellation to the Equinoxial, and to find their right afcenfions, and the points of the Zodiack w hich (hill have the feme fight afcenfions, will be at the beginning of thefe conftellations.
When a Star falls in the Colure 0f the Solftices as. the foot of Gemini in that Table where begins the conftellation, Cing, there is no difference between its fpngitude after our manner, and' its right afcenfioo, which is the longitude after the Chinefe v but as the Stars remove from the Colure of the Solftices, the difference" of their longitudes and of their right afcenfions augments fo much more, as; the latitudes or declinations, of the Stars are greater. And becaufe that the fixed Stats remove continually from one Colure and approach the other by 3 motion parallel to the Ecliptick, and oblique to the Equinoxial, this difference varies continually, and otherwife more conftellation than in another .* whence it happens that from one Age to the other the fame chinefe conftellation determined by two fixed Stars enlarges, or contratf*, and comprehends not alway s the Tame number of fixed Stars.