. Popular science monthly. may be older. The somatic char-acters of the human skull (Fig. 6), especially the lower jaw, postulategreat antiquity, as does the nature of the rude flint implements. Thatthe latter were found in association with a very primitive human typewould seem to give such implements a standing hitherto denied themby some authorities; unless it can be proved that they were derived froma deposit antedating the one which originally contained the humanremains. Their pedigree was needed in order to make industrial gene-alogy complete, just as the skull itself was needed to fill a
. Popular science monthly. may be older. The somatic char-acters of the human skull (Fig. 6), especially the lower jaw, postulategreat antiquity, as does the nature of the rude flint implements. Thatthe latter were found in association with a very primitive human typewould seem to give such implements a standing hitherto denied themby some authorities; unless it can be proved that they were derived froma deposit antedating the one which originally contained the humanremains. Their pedigree was needed in order to make industrial gene-alogy complete, just as the skull itself was needed to fill a gap in mansphysical evolution. It remains for the geologists to determine whetherin Piltdown the prehistorians Eosetta stone has at last been they will be able to tell us also whether a channel separated theman of Piltdown from his contemporaries in the near-by valley of theSomme. The present channel dates from the very close of the paleo-lithic period. That there was a channel in early paleolithic times is. Pl. IV. A Bison on a Column of Stalagmite ; the artist completed a figurealready blocked out fortuitously by nature. Cavern of Castillo, Puente Viesgo, Alcalde del Rio, Breuil and Sierra. Les cavernes de la region Cantibrique(Espagne). MAN, HIS ENVIRONMENT AND HIS ART 17 suggested b}r raised beaches near Calais and on the south coast ofEngland. All things considered, it looks as if pre-neolithic man had to con-tend with more than one glacial epoch, which means an environmentaldisturbance of the first magnitude. Think, for example, of a greatcontinental ice-sheet creeping slowly but inevitably down upon JSTewYork City. What an overturning of unearned increments! What asuccession of Titanic disasters at sea! But unearned increments andfloating palaces were happily non-existent in past glacial times. Pre-neolithic man simply abandoned his wind-break or folded his tent ofskins and carried it with him. Besides the European continental ice-sheet never r
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