A - H h 
PROCEEDINGS 
OF THE 
ROYAL SOCIETY OE EDINBURGH. 
SESSION 1855-56. 
CONTENTS. 
Monday , 26th November 1855. 
PAGE 
On the Occurrences of the Plague in Scotland during the 
Sixteenth and Seventeenth Centuries. By Robert 
Chambers, Esq., . . . . 326 
On a Problem in Combinations. By Professor Kell and, 326 
Occurrence of Native Iron in Liberia, in Africa. From a 
Letter of Dr A. A. Hayes, Chemist, Boston, U.S., to 
Professor H. D. Rogers. Communicated by Dr Gre- 
gory, ..... 327 • 
Donations to the Library, . . . . 328 
Monday , llth December 1855. 
Geological Notes on Banffshire. By R. Chambers, Esq., 
F.R.S.E., &c., .... 332 
On the Physical Geography of the Old Red Sandstone Sea 
of the Central District of Scotland. By Henry Clif- 
ton Sorby, F.G.S. Communicated by Professor Bal- 
four, ..... 334 
Donations to the Library, . . . . 334 
