this period--On the formation of rocks--The record imperfect--
The three great periods in animal life on the globe--Paleozoic
Age--Animal and vegetable life of this period--Ideal scenes in
this period--The Mesozoic Age--Animal and vegetable life of this
period--Advance noted--Abundance of reptilian life--First
appearance of birds--Nature's methods of work--the Cenozoic Age
Geological outline--Sketch of the Eocene Age--Of the Miocene
Age--What is sufficient proof of the presence of man--
Discussion on the Thenay flints--The Pliocene Age--Animal and
vegetable life of this age--Was man present during this age?--
Discussion of this subject--Summing up of the evidence--
Conclusion.


Chapter III.
MEN OF THE RIVER DRIFT.

Beginning of the Glacial Age--Interglacial Age--Man living
in Europe during this age--Map of Europe--Proof of former
elevation of land--The animals living in Europe during this age
--Conclusions drawn from these different animals--The vegetation
of this period--Different climatic conditions of Europe during
the Glacial Age--Proofs of the Glacial Age--Extent of Glacial
Ice--Evidence of warm Interglacial Age--The primitive state of
man--Early English civilization--Views of Horace--Primitive man
destitute of metals--Order in which different materials were
used by man for weapons--Evidence from the River Somme--History
of Boucher De Perthes's investigations. Discussion of the
subject--Antiquity of these remains--Improvement during the
Paleolithic Age--Description of the flint implements--Other