CLARK : GLACIAL SECTIONS, 
433 
10 or 15 feet higher than the sand-bed, since the water which 
covered the shaft bottom trickled in freely at 15 or 20 feet from 
the snrface. Excepting- deductions for friction, this would produce 
a pressure of half an atmosphere, so that the confined air would 
occupy a space about § of that required under ordinary circum- 
stances. On the eastern side there is a parallel ridge, beginning 
nearly opposite the junction of the Wharfe and Ouse to a little 
south of Stamford Bridge. 
The second series of sections were exposed in connexion with 
the extensive le veilings and excavations for the new Goods Station. 
These were begun in 1872 and continued until 1878, but unfor- 
tunately there is no record for the greater part of the work. 
Returning to York in August, 1875, the last half -acre only of the 
beds to be removed from the site were left, and these, also, were 
gone before I had leisure to examine them. They were very 
gravelly in parts, but sand-beds were not conspicuous. Altogether 
from 3 to 13 feet of " ballast " was removed from an area of 
4 acres. The part actually examined was the area below this, so 
far as it was disclosed by sections reaching at points to 14 feet 
deeper down, or a total depth of about 25 feet. These were 
uncovered in electing the present Goods Station, and occupied an 
area of about 2± acres (See Fig. IV). The N.E. boundary of the 
levelled area, with excavations for engine-sheds and various road 
approaches, added some interesting details. But the chief part is 
this levelled area, whose surface lies, as stated, from 3 to 12 feet 
below the original meadows. 
The Goods Station itself is a rectangular building of about 
120 yards by 60 yards, with an annex at the east end for offices, 
as shewn by the plan. Beneath this annex, and also for 78 feet 
from it, under the three platforms, the ground was excavated for 
cellars to a depth of 7 and 1\ feet. Further holes, some 7 feet 
deep, were made at the bottom of these. Over the rest of the 
area, shallow drains, pits, foundation trenches, and a drainage 
trench 6 feet deep, 16 feet from the building, gave disjointed, but 
