CONTENTS. 



CHAPTER III. 



320 TO 212 B.C. 



PACK 



School of Science at Alexandria The Ecliptic and the Zodiac 

 Greeks believed that the Sun moved round the Earth Aris- 

 t arcluis knew that it was the Earth which moved He also 

 knew of the Obliquity of the Ecliptic, and that the Seasons 

 are caused by it He knew that the Earth turns daily on its 

 Axis Euclid discovers that Light travels in straight lines 

 Archimedes discovers the Lever Principle of the Lever 

 Hiero's Crown, and how Archimedes discovered the principle 

 of Specific Gravity Screw of Archimedes . . . .18 



CHAPTER IV. 



280 TO 120 B.C. 



Erasistratusand Herophil us study the Human Body Eratosthenes 

 the Geographer lays down the First Parallel of Latitude and 

 the First Meridian of Longitude He measures the circumfer- 

 ence of the Earth Hipparchus writes on Astronomy Cata- 

 logues 1080 Stars Calculates when Eclipses will take place 

 Discovers the Precession of the Equinoxes . . .26 



CHAPTER V. 

 FROM A.D. 70 TO 2OO. 



Ptolemy founds the Ptolemaic System He writes on Geography 

 Strabo, a great traveller, writes on Geography Studies 

 Earthquakes and Volcanoes Pliny the Naturalist Galen the 

 greatest Physician of Antiquity Describes the two Sets of 

 Nerves Proves that Arteries contain Blood Lays clown a 

 theory of Medicine Greece and her Colonies conquered by 

 Rome Decay of Science in Greece Concluding remarks on 

 Greek Science . . . . . . . 32 



