LINNEAN SOCIETY OF LONDON. Clll 



a lady distinguished as well by her intellectual as her personal gifts, 

 by whom he had four sons and three daughters, only two of the former 

 and one of the latter, however, surviving him. 



In 1816 Professor Tiedemann quitted Landshut, where he had 

 previously lost several of his more eminent colleagues, either by 

 death or removal, for the wider sphere of the University of Heidel- 

 berg, where he again found himself the centre of a phalanx of young 

 and active coadjutors. Here he remained, the chief ornament of the 

 University, for thirty years, during which he formed, principally with 

 his own hands, a magnificent collection of anatomical and physiological 

 preparations, and attracted to his lectures crowds of students from 

 all parts of Europe, who, drawn to him at first by his great reputa- 

 tion as a teacher, remained ever afterwards attached to him with an 

 affectionate personal regard. 



He continued thus occupied incessantly and zealously in the duties 

 of his chair for nearly fifty years, when, partly broken down by the 

 loss of a son, who fell in the political disturbances which arose in 

 the Grand Duchy of Baden in 1848, and also by his increasing 

 blindness, he retired in 1849 to Frankfort, though he nevertheless 

 continued to occupy himself with physiological pursuits, and it was 

 here that he prepared his last work, ' On the History of Tobacco, 

 and its Effects,' in the course of which he made numerous and inter- 

 esting experiments on the influence of Nicotine. 



On the 10th of March, 1854 (the year in which this work was 

 published), his numerous friends, admirers, and pupils celebrated, 

 more Teutonico, the fiftieth anniversary of his Doctorate ; and on this 

 occasion a very fine commemorative medal was struck in his honour. 



In the spring of 1855 the cataracts in his eyes had made such 

 .progress that his sight was almost destroyed, and he was unable to 

 read or write, or even to go about alone. He consequently repaired to 

 Heidelberg, where, under the skilful hands of Chelius, a highly suc- 

 cessful operation restored vision to one who knew so well how to 

 employ it, and whose chief delight was in the contemplation of 

 nature. 



In 1856 Tiedemann followed his son-in-law, Professor Bischoff, 

 to Munich, in which city his and his wife's golden wedding-day was 

 celebrated by his friends and relations on the 30th of March, 1857, 

 and here he died on the 22nd of January, 1862. 



I can refer but briefly to Professor Tiedemann's published works, 

 and notice only the more important among them. 



In 1808 appeared the first volume of his * Zoology,' containing the 

 natural history of Man and the Mammalia, in which he endeavoured 



