—————————+———————————+——————————————————————————————— 57 | 26 | | | • ◯ • —————————+———————————+——————————————————————————————— 58 | 26 | | | • ◯ • • —————————+———————————+——————————————————————————————— 59 | 26 | • ◯ • • | | ⨀ Star. —————————+———————————+——————————————————————————————— 60 | 27 | • • ◯ • • | | Star ⨀ —————————+———————————+——————————————————————————————— 61 | 28 | • ◯ • | | Star ⨀ —————————+———————————+——————————————————————————————— 62 | 28 | | | • • ◯ • —————————+———————————+——————————————————————————————— 63 | Mar. 1 | • | | • • • ◯ | | Star ⨀ —————————+———————————+——————————————————————————————— 64 | 2 | • | | • ◯ • | | Star ⨀ —————————+———————————+——————————————————————————————— A PART OF THE PREFACE TO KEPLER’S DIOPTRICS FORMING _A CONTINUATION OF GALILEO’S SIDEREAL MESSENGER._ In the preface to Kepler’s _Dioptrics_ there are introduced letters of Galileo about the new and astonishing discoveries which he had made in the heavens by the aid of the telescope since the publication of his work, _The Sidereal Messenger_. The portion of the preface which refers to Galileo, containing these letters and Kepler’s remarks upon them, is added here, as continuing the original account of Galileo’s astronomical discoveries. _Extract from the Preface of Kepler’s Dioptrics. Augsburg, 1611._ [Sidenote: Kepler remarks on the importance of the application of the telescope to astronomical investigations as indicated by Galileo’s discoveries, published in his _Sidereal Messenger_.]