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as he hath, I shall acquaint you with it. * A Letter, written since from Paris, advertises, that some of the Curious there have received one of these Glasses of Sr. Burattini, and do esteem it to be good without mentioning the Dimension of it: which yet is look'd for by the next. * Before I conclude, I must give notice to the Lovers of Astronomy, that on the 24. of September (st. n.) of this year, I have observed that New Star in Pectore Cygni (which from the year 1662. untill this time hath been almost altogether hid) not only with my naked Eye, like a Star of the sixth or seventh Magnitude, but also with a very great Sextant. It is still in the very same place of the Heavens, where it was formerly from A. 1601. to almost 1662. For, its Distance from Scheat Pegasi hath been by me found 35°. 51′. 20″. and from Marcab, 43°.10′. 50″.; which Distances (as I have found in my Journal) are altogether equal to those, which I observ'd A. 1658. the 1. of November. For the Distance from Scheat at that time was 35°. 51′. 20″. and from Marcab, 43°. 10′. 25″: where that former from Scheat exactly answers to the recent; and that from Marcab, 'tis true, differs in a very few seconds, but that disparity is of no moment, since it only proceeded from thence, that this New Star is not yet so distinctly to be seen, as at that time, when it was of the third Magnitude. It is therefore certain, that it is the self same Star, which Kepler did first see A. 1601. and continued untill A. 1662. But whether in time it will grow bigger and bigger, or be lost again, time will shew. He that will observe this Star, must take care, lest he mistake those three more Southern ones, of the Sixth Magnitude, and now in a manner somewhat brighter (though not extant on the Globe) than the New Star in Collo Cygni. The highest of those three, is distant from Scheat Pegasi 36°. 24′. 45″; the middlemost from the same, 37°. 25′. 20″. and the lowest, 38°. 4′. 30″. Farewell, and assure the Most Illustrious Royal Society of my humblest Services.
So far Monsieur Hevelius, whose accurate Calcul. of the Solar Eclipses Duration, Quantity, &c. is intended to be fully represented the next Month, since it could not be conveniently done this time. The annexed Papers follow.
One is from Monsieur Joh. Schefferus, to this purpose.
1. That he is confident, the Royal Society of England will do much good for the advancement of usefull Knowledge.
