Astrologische Muthmassungen, von der Bedeuttung des jüngst entstandenen Cometen. [Basle]: Johann-Rudolph Genath, 1665.
Only edition of Basel mathematician and astronomer Peter Megerlin's treatise on the extremely bright comet that appeared in the late autumn of 1664. Megerlin's detailed observations begin on 7 December of that year, and continue for several weeks. He notes changes in the character, color, and apparent velocity of the.....