1564. (15th of February.) His Birth 1 His Ancestors 2 His early Years 3 1581. A Scholar of Arts at the University of Pisa 3 Studies Medicine under Andrew Cæsalpinus 3 His Work on the Hydrostatical Balance 4 Guido Ubaldi engages him to investigate the Centre of Gravity of solid Bodies 4 Appointed Lecturer of Mathematics at the University of Pisa 4 1600. Giordano Bruno burnt 4 Galileo attacks by Argument and Experiment the Aristotelian Laws of Gravity 5 Opposition of the Aristotelians to his Discoveries 6 A Method of clearing out the Harbour of Leghorn proposed by Don Giovanni de' Medici 6 Galileo opposes this Opinion; is persecuted in consequence 6 1592. He obtains the Professorship of Mathematics at the University of Padua 6 1593. Account of his Conversion to the Copernican System 7 He meets with an Accident 9 He completes his first Engagement at Padua 9 1598. Is re-elected other six Years 9 Accusation brought against him with respect to Marina Gamba 10 1604. A new Star excites the Attention of Galileo 10 1606. Again re-elected to the Professorship of Padua 10 His increasing Popularity 10 His Examination of the Properties of the Loadstone 10 1500. Doctor Gilbert's Work, the "De Magnete," published 11 1603. His Death 11 Cosmo proposes to Galileo to return to Pisa 11 The Arrangements suggested by Galileo, and the Manner of urging them 12 Dutch Telescopes 13 Galileo constructs his first Telescope 13 Interest which the Telescope excited in Venice 14 The Art of cleaning and polishing Lenses very imperfect 15 Results of the Observations of Galileo on the Moon 16 His Examination of the fixed Stars 16 1610. The Satellites of Jupiter discovered by Galileo 18 Galileo's Work, the "Sidereal Messenger," published 18