1 88 Afinual Report of the Council. 



chemistry. And the fact that by his 30th year he 

 had completed his history of chemistry, stamps him at 

 once as a remarkable man. The value of his work and 

 writings was soon recognised ; he became in succession 

 extraordinary and (when Liebig went to Munich) ordinary 

 professor at Giessen. Twenty years afterwards ( 1 863) he was 

 appointed professor at Heidelberg, where he remained to 

 the last. The agreeable surroundings of Heidelberg, and 

 the daily intercourse with such men as Bunsen, Kirchkoff, 

 Helmholtz, and Kuno Fischer were more to him than the 

 further advancements of position which were repeatedly 

 placed in his way. " Schon Bunsen allein halt mich in 

 Heidelberg fest" was his sufficient reply to all such 

 temptations, and with Bunsen he was almost daily to 

 be seen at such times as he allowed himself to be released 

 from his lecture room or his study. His experimental 

 researches, especially in the earlier years, were so extensive 

 that it is difficult to conceive how he found the opportunity 

 for any considerable literary work. We need only give the 

 titles of the more important of his writings, however, to 

 indicate his immense activity in this direction : — 



(1) " Geschichte der Chemie," 4 vols., 1843- 1847 ; 



(2) "Beitrage zur Geschichte der Chemie," 1869-75 ; 



" Entwickelung der Chemie in der neueren Zeit," 1873; 



" Die Alchemie in alterer und neuerer Zeit." 



These latter works may be regarded as supplementary 



to the first, and were meant to furnish the basis of a history 



of Chemistry on even a more complete and exhaustive 



scale than the original work. 



(3) " Einleitung in die Krystallographie." 



(4) Coadjutator from 1849 in the " Jahresbericht der 



Chemie," and from 1851 in Liebig's Annalen, and in 

 Graham Otto's Physical and Theoretical Chemistry. 



