Dr. Ferdinand von Roemer. 135 
with the same zeal, the same vivacity, and the same clearness 
that characterized his work when a young man.,’’* 
While his activity in the routine duties of his professorship 
was very great it was not less in the direction of research and 
investigation. In the Neues Jahrbuch f. Min. Geol. und Pal. 
Dr. Dames has listed over 350 titles of publications in the 
interval between his graduation in» 1842 and his death in 
1891, many of which represent long and patient in- 
vestigations. While it would not be possible’ within 
the limits of this sketch even to mention all the subjects cov- 
ered, for they are of wide range, attention may be called to a 
few other than those already alluded to in the preceding pages. 
During the years 1852-1854 he published in connection with 
its author a revision of H. G. Bronn’s ‘‘Lithaea geognostica oder 
Abbildung und Beschreibung der ftir die Gebirgs-Forma- 
tionen bezeichnenedsten Versteinerungen. Bd. I. 2: Palaeo- 
Lethaea; Kohlen-Periode (Silur, Devon, Kohlen-und Zechs- 
tein-ormation).” More than twenty years Tater we find 
him again engaged upon an enlarged and revised edition of 
this work. The atlas, with 65 plates, appeared in 1876; in 
1880 the first part of the text, and in 1883 the second part. It 
is a matter of regret that he did not live to complete this un- 
dertaking. In 1861 he published “Die Fossile Fauna der Sil- 
urischen Diluvial-Geschiebe von Sadewitz bei Ols in Nieder- 
schlesien.” This was in the form of a “Gratulationsschrift” 
of the Silesian Society to the Breslau University at its jubilee 
held that year. 
In July 1862 the preparation of a geognostic map of Up- 
per Silesia on the scale of I : 100,000 was authorized by the 
Prussian Ministers of Commerce, Trade and Public Works 
and Roemer was selected to direct its construction. For 
eight years assisted by O. Degenhart, H. Eck and A. Halfer, 
he devoted himself to this work and at the same time made 
numerous short contributions announcing new discoveries in 
the geology and paleontology of that region. These served 
as forerunners of the “Geologie von Oberschlesien,” a work 
in three volumes published in 1870, which contained the com- 
plete results of the investigations of himself and his assistants. 
The great value of this publication is evident when we take in 
*Danes. 
