GALILEO GALILEI. 15 



writing on it. I have also various treatises on 

 natural subjects, on sound and speech, on sight 

 and colors, on the tide, on the composition of con- 

 tinuous quantity, on the motion of animals, and 

 others ; besides, I have also an idea of writing 

 some books on the military art, giving not only a 

 model of a soldier, but teaching, with very exact 

 rules, all which it is his duty to know that de- 

 pends on mathematics ; as, for instance, the knowl- 

 edge of encampment, drawing up battalions, 

 fortifications, assaults, planning, surveying, the 

 knowledge of artillery, the use of various instru- 

 ments, etc." 



With all this work in mind, he resigned the 

 professorship at Padua, and removed to Florence, 

 the Grand Duke Cosmo II. giving him a yearly 

 salary of about one thousand dollars, and the title 

 of Philosopher to His Highness. 



His first thought, as ever, was for his family. 

 He asked an advance of two years' salary, and 

 paid the dowry debts of his sisters' grasping hus- 

 bands. 



In 1611. his expenses paid by the Grand Duke, 

 he went to Eome to show his " celestial novelties," 

 as they were called, to the pope and the cardinals. 

 He was received with great attention, and all . 

 seemed delighted to look upon the wonders of the \ 

 heavens, provided always that nothing could be 

 proved against the supposed assertion of the Bible 

 that the earth did not move ! 



Galileo soon published his " Discourse on Float- 



