INDEX. 



4C7 



WILLUGHBY 



Willughby and Ray, 142 ; death of, 143 ; 



on classification of animals, 143 

 Wohler on organic chemistry, 377 

 Wolff on metamorphosis ol plants, 383 

 WoUaston, Dr., observes dark lines in the 



spectrum, 318 

 Woodward, his geological collection, 216 

 Woolsthorpe, birthplace of Newton, 147 

 World, first voyages round the, 56 

 Worm, re^rowth of divided parts of the, 



30I 



ZOOLOGY 



YEAR, length of calculated, 45 

 Young, Dr., his life, 303 ; on inter- 

 ference of light, 304-306 ; and Frcsnel on 

 polarisation of light, 311 



ZODIAC, or circle of animals, 19 

 Zoology, Aristotle on, 16 ; Gcsner on, 

 69 ; Ray and Willughby on, 143 ; Lin- 

 naeus on, 210 ; Cuvier, St.-Hilaire, and 

 Goethe on, 391 et seg. ; Darwin on, 426 



