It is probable that they exist
in all parts of the world.
These remains are called prehistoric because they are more ancient
than written history. For about fifty years men have been engaged in
recovering and studying them. Today most museums have a hall, or at
least, some cases filled with these relics. A museum at
Saint-German-en-Laye, near Paris, is entirely given up to prehistoric
remains. In Denmark is a collection of more than 30,000 objects. Every
day adds to the discoveries as excavations are made, houses built, and
cuts made for railroads.
These objects are not found on the surface of the ground, but
ordinarily buried deeply where the earth has not been disturbed. They
are recovered from a stratum of gravel or clay which has been
deposited gradually and has fixed them in place safe from the air, a
sure proof that they have been there for a long time.
=Prehistoric Science.=--Scholars have examined the debris and have
asked themselves what men have left them. From their skeletons, they
have tried to construct their physical appearance; from their tools,
the kind of life they led.
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