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At the St. Louis Science Center, they had blocks that you could build an arch like that and it supported itself, although they had rubbery vinal so they stuck together.
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Actually when you think of it those totes are the perfect shape to make an arch out of. Since they are shaped like a key stone.
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If either a public officer or any one else saw a person attempting to cross a bridge which had been ascertained to be unsafe, and there were no time to warn him of his danger, they might seize him and turn him back without any real infringement of his liberty; for liberty consists in doing what one desires, and he does not desire to fall into the river. -Mill
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