11 Pages in Charles Darwin's Library associated with "strata/epochs - purbeck"

A manual of elementary geology.
By: Lyell, Charles.
Publication info: [s.n.] :[s.n.],1855.
Pages: Page 301 Page 461
Principles of geology.
By: Lyell, Charles.
Publication info: London :John Murray,1837.
Volume: v.4
Pages: Page 284
Supplement to the fifth edition of A manual of elementary geology.
By: Lyell, Charles.
Publication info: London :John Murray,1857.
Pages: Page 24 Page 25
über den Einfluss der Isolirung auf die Artbildung.
By: Weismann, August,
Publication info: Leipzig :W. Engelmann,1872.
Pages: Page 8 Page 12 Page 12 Page 41 Page 41 End Slip , side 1