CHRONOLOGICAL TABLE. 



443 



PROGRESS OF MODERN SCIENCE. 



FROM A.D 1609 TO 1 642. 



Astronomy. 



1609. Galileo 

 discovers secon- 

 dary light of the 

 moon ; Jupiter's 

 moons ; phases 

 of Venus, pp. 

 89-92. 



1609. Kepler's 

 two first laws, 

 pp. 97-99- 



161 1. Galileo ob- 

 serves sun-spots 

 and proves ro- 

 tation of sun on 

 its axis, p. 92. 



i6i8. Kepler's 

 third law, p. 

 100. 



Physics and 

 Mechanics. 



[628. Kepler com- 

 pletes Rudol 

 phine tables; 

 and foretells 

 transits of Venus 

 and Mercury, 



P- 157- 



1631. Gassendi 

 observes transit 

 of Mercury, p, 



157- 



1632. Galileo's 

 system of the 

 world ; his re- 

 cantation, p. 93. 



1639. Horrocks 

 observes transit 

 of Venus, p. 



1642. Death of 

 Galileo and 

 birth of New- 

 ten, pp. 64-147. 



L. 



1609. Invention 

 of the telescope, 

 p. 87 ; Galileo's 

 telescope, p. 89. 



1611. Kepler's 

 telescope, p. 97. 



I 6 I 5. Solomon 

 Cans' engine, 

 p. 246. 



620. Drebbel, 

 alcohol thermo- 

 meter, p. 120. 



1620. Bacon's 

 'Novum O r- 

 ganum,' p. 103 ; 

 Bacon suggests 

 that heat may 

 be a movement, 



P- 330; ... 



1621. Snellius 

 discovers law 

 of refraction, p. 

 106. 



1625. De Domi- 

 nis explains the 

 rainbow, p. 164. 



Chemistry. 



1624. Van Hel 

 mont introduces 

 the term gas, p. 

 72. 



;637. Descartes 

 on light and re- 

 fraction, pp 

 107-165. 



Physical 



Geography and 



Geology. 



Biology. 



1619. Harvey 

 discovers circu- 

 lation of the 

 blood, pp. 110- 

 114. 



1622. Asellius 

 discovers lac- 

 teals, 114. 



