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By TnT (registered) | Posted December 14, 2011 at 18:00:21
Professor, is there a difference between modern Portland ( I hope that is right name) cement and Roman cement? I had a driveway done and the guy explained to me that cement of the ancient world was different.
Look at a stonecutter hammering away at his rock perhaps a hundred times without so much as a crack showing in it. Yet at the hundred and first blow it will split in two, and I know it was not that blow that did it, but all that came before.--Jacob Riis
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