HUGO VON MOHL. 355 
Botanic Garden of St. Petersburg, as assistant to its director, 
Dr. Fischer, and to the chair of physiology in the Academy of 
Berne. He accepted the latter in 1832, and occupied it until 
1835. Then, upon the death of Schubler, he returned to 
Tiibingen, accepted the professorship of botany in its high 
school, in which chair and in that of Tiibingen the rest of 
his life was passed. Invitations to more prominent and lucra- 
tive positions, as, for example, to the botanical chair at Berlin 
University, when vacated by the death of the veteran Link, 
were unhesitatingly declined. Although he published numer- 
ous (about ninety) special papers or articles, most of them 
important and timely, and some of great pith and moment, 
he resolutely declined to bring out any general work. His 
“* Mikrographie ”’ (1846) and his “ Principles of the Anatomy 
and Physiology of the Vegetable Cell” are his only writings 
which may claim to be such.; The latter, an admirable and 
still invaluable treatise, appeared as an article in Rudolf 
Wagner's “ Cyclopedia of Physiology,” but is best known to 
English readers in its separate form, in a translation made by 
the late Professor Henfrey, with the author’s sanction, issued 
by Van Voorst in 1852. A year or two later it was for a 
time understood, to the great satisfaction of botanists, that 
Mohl had agreed to take a prominent part in the production 
of a general manual of the anatomy and physiology of plants ; 
but his promise was soon withdrawn. For thirty years he was 
one of the editors of the “ Botanische Zeitung” ; but the edi- 
torial labor must have devolved mainly upon Schlechtendal 
and his successor, although occasional articles from Mohl’s 
pen appeared as late as the year 1871. During that year 
his health became seriously impaired; yet as the new year 
advanced, apprehension disappeared. Upon Easter Monday 
he was apparently well, and so retired to nightly rest; in the 
morning he was found to have died in sleep. 
