KENDALL : PRESIDENTIAL ADDRESS- 
183 
The}^ were challenged to cite any modern illustration of a 
glacier carrpng shells, to which the only reply given was that 
such things could not be expected save in the Arctic regions, 
but that when a glacier could be caught in the act of crossing the 
sea-floor it would perhaps be found to transport shells. The 
logic of this reply is far from perfect, but it has been fully justified 
by the observations in Spitsbergen of the Swedish Geologists, of 
which Mr. Lamplugh promises us a full account corroborated by 
his own observations. 
On this part of the issue, therefore, the land-ice theory' claims 
the verdict. 
Other aspects of the Glacial question have received illumma- 
tion from the stud}^ of streamless valleys in this county, and, later, 
in many other parts of the British Isles. All observers who have 
investigated these phenomena in the field assent to the interpreta- 
tion offered of the Yorkshire examples that they are the overflow 
channels of lakes held up by the margins of glaciers and ice-sheets, 
of whose positions they afford new and interesting proofs. The 
Geological Survey has explicitly adopted this explanation, and 
almost every recent memoir on a glaciated region contains 
references to these phenomena. 
It was hoped that the old controversies had quite died out, 
and that the supporters of the Great Submergence were either con- 
verted or at least silenced, and it was therefore with a real and deep 
regret that we saw a yesir ago one of the most prominent of them 
blowing up the embers of a burnt do^m controversy. 
It must not be supposed from this summary of achievements 
in every department of Geology that nothing remains for the 
rising generation of Geologists in Yorkshire to discover in the 
county. The vista, ^^idens as we approach it, and every new avenue 
of research discloses larger and yet larger prospects. Who is there 
that reads anew his " exhaustive " paper of ten years ago, but 
finds to his dismay that he had touched but the fringe of the 
subject ? Some of us have even found the subject of an apparently 
completed research so to grow under the pen that the pen has been 
laid aside for the hammer and a few more j^ears of field work. 
There is no finality, and all ^^Titing is premature ; this is the 
feeling that often overcomes the geologist in his pessimistic or 
lethargic moods, but with renewal of energy, in optimistic spirit, 
he declares that " much has been done, but more remains to do." 
Let us up and do our part. 
