CONTENTS OF THE FIRST VOLUME. xxvn 



PAGE 



Sect. 2. Estimate of the Value of the Theory of Eccentrics 



and Epicycles 192 



Sect 3. Discovery of the Precession of the Equinoxes . 199 



CHAPTER IV. SEQUEL TO THE INDUCTIVE EPOCH OF 

 HIPPARCHUS. 



Sect. I . Researches which verified the Theory . . 203 



Sect. 2. Researches which did not verify the Theory . 2f>7 



Sect. 3. Methods of Observation of the Greek Astronomers 210 

 Sect. 4. Period from Hipparchus to Ptolemy . . .219 



Sect 5. Measures of the Earth 224 



Sect. 6. Ptolemy's Discovery of Evection . . ; .. 226 



Sect. 7- Conclusion of the History of Greek Astronomy . 234 



Sect. 8. Arabian Astronomy 236 



BOOK IV. 



HISTORY OF PHYSICAL SCIENCE IN THE 

 MIDDLE AGES. 



Introduction . .251 



CHAPTER I. ON THE INDISTINCTNESS OP IDEAS OF THE 



MIDDLE AGES 251 



1 . Collections of Opinions 255 



2. Indistinctness of Ideas in Mechanics .... 257 



3. shewn in Architecture . . 263 



4. in Astronomy .... 264 



5. shewn by Skeptics . 265 



6. Neglect of Physical Reasoning in Christendom . . 268 



7- Question of Antipodes ...... 269 



8. Intellectual Condition of the Religious Orders . ,. 273 



9. Popular Opinions 276 



CHAPTER II. THE COMMENTATORIAL SPIRIT OF THE 



MIDDLE AGES. . . . " : J 280 



1. Natural Bias to Authority . . . . 282 



2. Character of Commentators ..... 284 



3. Greek Commentators of Aristotle .... 287 



