THE LAST DECADE. 
423 
divisioDS, the lowermost much resembling the purple boulder clays of 
Holderness. This appearance indicates a deposition from floating 
ice rather than from the moraine profonde of an ice-sheet ; otherwise 
it would be difficult to account for beds of gravel, boulders, and 
current-bedded sands so closely associated with the tough stone 
clays. Judging from the material, the ice-sheet or flows must have 
come from the north-west. The upper division appears to indicate a 
period much less severe than the lower, and consisted principally of 
sand, gravels, and boulders, with occasional beds of clay. Post- 
glacial beds probably derived from the glacial of the district have 
been formed to a considerable depth. Brickclays are worked for 
thirty feet in thickness, and the river deposits seem to go up much 
deeper. The Ouse now runs at a height of sixty or seventy feet 
above its pre-glacial bed ; the slight protrusions from the general 
dead level are of glacial origin, whilst the river flood and tidal 
deposits have largely obliterated these undulations by filling them up 
perhaps as much as fifty feet above the level to which the river first 
cut down its bed in the opening of the post-glacial epoch. 
In 1882 the Council decided that biogTaphical notices of eminent 
Yorkshire Geologists should be printed in the proceedings, if possible 
annually. In accordance with this resolution, the Editor of the 
Proceedings contributed the first notice, his subject being John 
Phillips. In the following year a very instructive and interesting 
biography of Prof. Adam Sedgwick was contributed from the pen of 
Prof. T. M'Kenny Hughes, of Cambridge. In 1884 Dr. W. C 
Williamson, Professor of Botany at the Owen's College, Manchester, 
contributed a biographical notice of his father, John Williamson, late 
of Scarborough. The article is full of interest, not only illustrating 
the salient features in the life of Mr. Williamson, but also of that 
gToup of scientists for which Scarbro' was for many years famous, 
including the Rev. Geo. Young, Wm. Bean, and John Bird, together 
with reminiscences of Wm. Smith, Prof. Phillips and others. 
At a meeting held at Dewsbury in May, 1882, Mr. Jas. W. Davis 
contributed some notes on the occurrence of fossil fish-remains in the 
Carboniferous Limestone of Yorkshire. The fish-remains in this dis- 
trict are neither numerous nor are they found in a gTeat number of 
