Summary.—The successive steps in the art of stone working in the Palæolithic may be summarized thus:
Chellean: Coarse flakes detached by blows from the core, which becomes the implement.
Acheulean: Same process applied to more varied forms.
Mousterian: Flake detached by a blow is sharpened into a tool by retouching by pressure on one side only.
Aurignacian: Same with improved retouching applied.
Solutrean: Both surfaces of implement wholly retouched.
Magdalenian: Prismatic flake, detached by a blow transmitted through a point.
73. Other Materials: Bone and Horn
Stone implements must perhaps always remain in the foreground of our understanding of the Old Stone Age because they were made so much more numerously than other objects, or at any rate have been preserved so much more abundantly, that they will supply us with the bulk of our evidence. At the same time it would be an error to believe that the life of these men of long ago was filled with the making and using of stone tools to the exclusion of everything else. Gradually during the last fifty years, through unremittingly patient explorations and the piecing of one small discovery to another, there has accumulated a fair body of knowledge of other sides of the life of Palæolithic men. There is every reason to believe that as time goes on we shall learn more and more about them, and thus be able to reconstruct a reasonably complete and vivid picture of their behavior.
Implements of bone and horn are next most abundant after those of stone, but it is significant that the Lower Palæolithic still dispensed with these materials. In the Chellean and Acheulean stations, although broken bones of devoured animals occur, bone was not shaped. In the Mousterian this material first came into use, but as yet only as so-called “anvils” on which to chip flint or cut, and not as true tools.