lifetime. On account of the wider scope of its contents he gave it the title Astronomiæ Instauratæ Progymnasmata, or Introduction to the New Astronomy, a title which marks the work as paving the way for the new planetary theory and tables which Tycho had hoped to prepare, but which it fell to Kepler's lot to work out in a very different manner from that contemplated by Tycho. The second volume was devoted to the comet of 1577, and as the subject did not lead to the introduction of extraneous matter, this volume was finished long before the first one. The third volume was in a similar manner to treat of the comets of 1580 and following years, but it was never published, nor even written, though a great deal of material about the comet of 1585 was put together and first published in 1845 with the observations of this comet.[1]
The two volumes about the new star and the comet of 1577 were printed in Tycho's own printing-office at Uraniborg, and after some delay caused by want of paper, the second volume was completed in 1588.[2] The title is "Tychonis Brahe Dani, De Mundi ætherei recentioribus phænomenis Liber secundus, qui est de illustri stella caudata ab elapso fere triente Nouembris anno mdlxxvii usque in finem Januarii sequentis conspecta. Vraniburgi cum Privilegio." The book is in demy 4to, 465 pp., and the
- ↑ The third volume is alluded to in several places in Tycho's writings, e.g. Proyym., i. pp. 513 and 714; Epist., pp. 12, 20, 104, &c.
- ↑ In the above-mentioned letter to Below, Tycho wrote in December 1587 that he should soon be in want of paper for a book which was being printed in his office, and had applied to the managers of two paper-mills in Mecklenburg without getting an answer. He therefore asked Below to write to the managers of these mills, and to ask some friend at the Duke's court to intercede for him; that he would willingly pay for the paper, which might be sent through his friend Brucæus at Rostock. Below wrote at once (28th December 1587) to Duke Ulrich, and asked him to do Tycho this favour, "der löblichen Kunst der Astronomie zur Beförderung " (Lisch, l. c., p. 6). To avoid a repetition of this inconvenience the paper-mill at Hveen was built a few years later.
