CH. xxxvi. ORGANIC CHEMISTRY. 379 



created in a living body are extremely complicated, making 

 the whole subject very difficult to understand. Moreover, 

 we do not pretend to follow out the particulars of any 

 science ; if you can remember the names of some of the 

 great pioneers of chemistry from the time of Geber in the 

 ninth century up to the days of Davy, Faraday, and Liebig, 

 and have some slight understanding of the nature of the 

 work they did, it is all we can attempt in a book of this 

 kind. 



Chief Works consulted. Davy's 'Works,' 1840; WhewelFs 'Induc- 

 tive Sciences;' Dalton's 'Chemical Philosophy,' 1808; Dr. Henry's 

 'Memoir of Dal ton,' 1854; Fownes's 'Chemistry;' Brande's 'Che- 

 mistry ; ' Faraday's * Various Forces of Nature ; ' ' Edinburgh Re- 

 view,' vol. xciv. ' Modern Chemistry ;' Hoffmann, 'On Liebig and 

 Faraday.' 



