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“The earliest lock gates moved vertically, subjecting them to great pressure and friction. Leonardo’s innovation was paired mitered lock gates forming a V pointed in the direction of the higher water. Water was deflected to the sides when the gates were swung open, and pressure sealed the lock when the gates were closed. Over half a millennium later, canal locks are still built”
― Bond of Union: Building the Erie Canal and the American Empire
― Bond of Union: Building the Erie Canal and the American Empire
“The earliest of the outraged—Clement Clarke Moore, Edgar Allan Poe, Frederick Law Olmsted, and others with just two names—saw the grid plan become reality through the 1800s.”
― City on a Grid: How New York Became New York
― City on a Grid: How New York Became New York
