LINNEAN SOCIETY OF LONDON. cili 
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 endeayoured 
