EVIDENCES OF THE USE OF CORE DRILLS, DIAMOND SAWS, AND DIAMOND TURNING TOOLS BY THE BUILDERS OF THE PYRAMIDS from the article ' QUARRYING METHODS OF THE ANCIENTS ' by W. F. Durfee M. Am. Soc. M. E. from The Engineering Magazine DEVOTED TO INDUSTRIAL PROGRESS Volume VII April to September, 1894 NEW YORK The Engineering Magazine Co

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