XXXi1V PROCEEDINGS OF THE GEOLOGICAL SOCIETY. 
the functions of a Professor of Geology, first in connexion with the 
Royal Dublin Society and Museum of Irish Industry, and afterwards 
in the Royal College of Science in Dublin. He wrote a very good 
elementary manual of geology, and some school-books upon geology 
and physical geography ; and he read a large number of papers 
and notices before this society and the Geological Society of Dublin, 
of which last body he was President during the years 1853 and 1854. 
Several of these papers, such as that “On the mode of formation 
of some of the river-valleys of the South of Ireland,” show how 
completely Mr. Jukes shared with his colleagues, Prof. Ramsay and 
others, that tendency to return to Huttonian methods of accounting 
for the form of terrestrial surfaces which is so marked a feature of 
a rising and active school of geologists. 
The Fellows of this Society have, doubtless, a clear recollection of 
the discussions to which two of Mr. Jukes’s papers, that ‘On the 
mode of formation of river-valleys of the South of Ireland,” to which 
[have just referred, and that “‘ Upon the Carboniferous slates and 
Devonian rocks and the Old Red Sandstone of the South of Ireland,” 
gave rise. They will have a vivid remembrance of the heartiness and 
vigour with which our colleague threw himself into the defence of 
his favourite views; and I am sure they will no less distinctly bear 
in mind the inexhaustible fund of good humour with which he bore 
the onslaughts of his opponents. 
It was my privilege to count Mr. Jukes among my oldest and 
most familiar friends. He had an eminently transparent character, 
and I can honestly say that, after nearly twenty years’ intercourse, 
my mental picture of him remains as it at first impressed itself, 
that of an upright, generous man, of considerable scientific powers, 
of great energy, of good administrative capacity, and of the most 
entire honesty of purpose. If his openness and generosity occasionally 
led him into what, in his official position, was imprudence in his 
dealings with men, andif his energy sometimes took what his friends 
thought a wrong direction, no one could better bear being told of 
his faults, or be less resentful of good counsel. 
Mr. Jukes had a remarkably fine and robust-looking bodily frame; 
but his health broke down in 1866, and though he rallied and became 
almost himself again, his disease made progress, and after being dis- 
abled for nine months, he died on the Ist of August, 1869. 
The life of Hermann Curistran Ertcu von Meyer, who was born 
at Frankfort on the Maine on the 3rd September 1801, is that of a 
retired student, and as such devoid of incident, though few men will 
leave a deeper mark upon the records of paleontology. He himself, 
in the preface to his ‘ Essay on fossil teeth and bones of Georgens- 
gmiind,’ written in 1834, tells us how he was led to the study 
of fossils :— ; 
“When many years ago I began this investigation, I little thought 
of the difficulties which awaited me. Love of the work has helped 
me to overcome them, though they made themselves severely felt 
as I went on. I was familiar only with chemistry and mineralogy, 
