viii CONTENTS. 



CHAPTER PAGE 



XIII. ANIMAL MOTION 188 



XIV. GENERATION AND DEVELOPMENT - 195 



XV. CLASSIFICATION OF ANIMALS - - 208 



XVI. ARISTOTLE S ANAIMA, OR ANIMALS WITH 

 OUT BLOOD - - 216 



XVII. ARISTOTLE S ENAIMA, OR ANIMALS WITH 



BLOOD - 229 



XVIII. ARISTOTLE S ENAIMA, OR ANIMALS WITH 



BLOOD (continued) - 250 



ILLUSTKATIVE DEAWINGS. 



FIG. 1. APPEARANCE OF EAINBOWS, AS SEEN AT ATHENS. 



2. ARRANGEMENT OF THE COLOURS OF RAINBOWS, ACCORD 

 ING TO ARISTOTLE. 



,, 3. ARISTOTLE S COMPASS. 



,, 4. GRADATION FROM INANIMATE MATTER THROUGH LOWER 

 TO HIGHER FORMS OF LIFE. 



5. ARISTOTLE S ELEMENTS AND THEIR RELATIONS. 

 ,, 6. LEFT ASTRAGALUS OF A SHEEP. 



,, 7. BONES FROM THE HEART OF A THREE-YEAR OLD Ox. 

 8. HEART AND BLOOD-VESSELS, ACCORDING TO ARISTOTLE. 

 ,, 9. EGG OPENED AFTER EIGHT DAYS INCUBATION. 

 10. CHICK REMOVED FROM E&G AFTER TEN DAYS INCUBA 

 TION. 



