On certain peculiarities of climate during part of the Permian epoch /
Ramsay, Andrew Crombie,Sir,1814-1891.
Royal Institution of Great Britain.
[London : s.n.,
1857]
At head of title: Royal Institution of Great Britain. Weekly evening meeting, Friday, April 24, 1857.
Title from caption.
Climatic changes.
Geology, Stratigraphic