Thirdly, Although we derive the authority of these daies from observations of the Ancients, yet are our computes very different, and such as confirm not each other. For whereas they observed it Heliacally, we seem to observe it Cosmically; for before it ariseth Heliacally unto our latitude, the Summer is even at an end. Again, we compute not only from different ascents, but also from divers Stars; they from the greater Dog-star, we from the lesser; they from _Orions_ we from _Cephalus_ his Dog; they from _Seirius_, we from _Procyon_; for the beginning of the Dog-daies with us is set down the 19 of _July_, about which time the lesser Dog-star ariseth with the Sun; whereas the Star of the greater Dog ascendeth not until after that month. And this mistake will yet be larger, if the compute be made stricter, and as Dr. _Bainbrigge_ late professor of Astronomy in Oxford, hath set it down [SN: Bainb. Canicularis.]. Who in the year 1629 computed, that in the Horizon of _Oxford_ the Dog-star arose not before the fifteenth day of _August_; when in our Almanack accounts, those daies are almost ended. So that the common and received time not answering the true compute, it frustrates the observations of our selves. And being also different from the calculations of the Ancients, their observations confirm not ours, nor ours theirs, but rather confute each other. Nor will the computes of the Ancients be so Authentick unto those, who shall take notice, how commonly they applied the celestial descriptions of other climes unto their own; wherein the learned _Bainbrigius_ justly reprehendeth _Manilius_, who transferred the _Ægyptian_ descriptions unto the _Roman_ account; confounding the observation of the _Greek_ and _Barbarick_ Spheres. Fourthly, (which is the Argument of _Geminus_) were there any such effectual heat in this Star, yet could it but weakly evidence the same in Summer; it being about 40 degrees distant from the Sun: and should rather manifest its warming power in the Winter, when it remains conjoyned with the Sun in its Hybernal conversion. For about the 29 of _October_, and in the 16 of _Scorpius_ and so again in _January_, the Sun performs his revolution in the same parallel with the Dog-star. Again, If we should impute the heat of this season, unto the co-operation of any Stars with the Sun, it seems more favourable for our times, to ascribe the same unto the constellation of _Leo_. Where besides that the Sun is in his proper house, it is conjoyned with many Stars; whereof two of the first magnitude; and in the 8{th} of _August_ is corporally conjoyned with _Basilicus_; a Star of eminent name in Astrology, and seated almost in the Ecliptick.