Einstein Again

The city of Chicago is flat. Around it the country is flat as it stretches away in all directions—except to the East, where there is fresh water. On this surrounding prairie, there lies a town called Clearing. Here on a piece of open ground, workmen have been busy laying a great amount of twelve-inch water-mains. They are the most curious water-mains that have ever been laid. There are 72,000 linear feet of them, connected with seven tons of lead to make the joints airtight. The labor of...

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