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[Illustration]

THE EARLY CAVE-MEN

[Illustration]




=Industrial and Social History Series=

_By KATHARINE ELIZABETH DOPP, Ph. D._

_The Extension Division of The University of Chicago. Author of “The
Place of Industries in Elementary Education”_


    =Book I. THE TREE-DWELLERS.= THE AGE OF FEAR.
      Illustrated with a map, 14 full-page and 46 text
      drawings in half-tone by Howard V. Brown.
      Cloth. Square 12mo. 158 pages; 45 cents.

    _For the