654 
that millions of our race are now supported by lands situated 
where deep seas prevailed in earlier ages. In many districts 
not yet occupied by man, land animals and forests now 
abound, where ships once sailed ; and on the other hand we 
shall find on inquiry, that inroads of the ocean have been 
no less considerable. When, to these revolutions produced 
by aqueous causes, we add analogous changes wrought by 
igneous agency, we shall perhaps acknowledge the justice 
of the conclusion of Aristotle, who declared (Meteorics, 
chapter 12,) " That the whole land and sea on our globe 
periodically changed places." 
NOTICE OF THE DISCOVERY OF A BRITISH DAGGER FOUND 
AT WOODNOOK, NEAR WAKEFIELD. 
T. Wilson, Esq., Vice-President of the Society, read 
a " Notice of the discovery of an ancient British Dagger 
at Woodnook, near Wakefield." The dagger was found 
in the year 1842, in the valley of the Calder, about five 
miles north-east of Wakefield, in the township of Altofts. 
Not far from the point where the Midland Railway crosses 
the river Calder, and on the west side, may be seen a lock, 
by which the new line of navigation re-enters the river. While 
the workmen were excavating this lock, at a depth of twenty- 
four feet from the surface, they came to the shale which forms 
the upper portion of the original rock of the district. Over 
this they had passed through alluvial matter ; the alterna- 
tions of which the author described. A section of the 
spot gives the following : — 
Soil ] 
Sand 
Gravel ; 2 4 feet 
Silt and Sand with Black Oak 
Red Gravel 
Black Bind J 
