THE PHOTOGEAPH. 
The photograph issued with this volume of proceedings 
represents a large block of Silurian Eock perched upon 
Mountain Limestone. It is situated at Norber, near 
Clapham, in Yorkshire. A paper relating to the Erratic 
Blocks at Norber was printed in the proceedings for last 
year, page 266, which may be consulted for further , 
particulars. 
