Discussion on the effect of the European
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Article
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1915
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Wiley (John Wiley & Sons)
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## 327 top and bottom stones were rlressed cxnctly d i k e as they laic1 sidc by side: when t h e top stona wn.q turned over the furrows would be in opposite dircctions, so thnt mhcn i t w n ~ twisted round there mns n scissor-like action between tho stones. The " lnnd " was the ground beta-ccn t