Theory--Geographical causes--The two theories not antagonistic--
The date of the Glacial Age--Probable length of the Paleolithic
Age--Time Since the close of the Glacial Age--Summary
of results.


Chapter VI.
THE NEOLITHIC AGE IN EUROPE.

Close of the first cycle--Neolithic culture connected with the
present--No links between the two ages--Long lapse of time
between the two ages--Swiss lake villages--This form of villages
widely scattered--Irish cranogs--Fortified villages--Implements
and weapons of Neolithic times--Possessed of pottery--Neolithic
agriculture--Possessed of domestic animals--Danish shell-heaps--
Importance of flint--The art of navigation--Neolithic clothing--
Their mode of burial--The question of race--Possible remnants--
Connection with the Turanian race--Arrival of the Celts.


Chapter VII.
THE BRONZE AGE IN EUROPE.

Races of Men, like Individuals--Gradual change of Neolithic Age
to that of Bronze--The Aryan family--First Aryans Neolithic--
Origin of Bronze--How Great discoveries are made--Gold the first
metal--Copper abundant--No Copper Age--The discovery of Tin--
Explanation of an Alloy--Bronze, wherever found, the same
composition--What is meant by the Bronze Age--Knowledge in other
directions--Gradual Growth of Culture--Three Centers of Bronze