Back in the 1980s, a number of soldiers drowned in the hydraulic below the dam at the Little Falls pumping station on the Potomac. One of Tufte's books (I think

Back in the 1980s, a number of soldiers drowned in the hydraulic below the dam at the Little Falls pumping station on the Potomac. One of Tufte's books (I think Envisioning Information) includes the illustration of the effect that The Washington Post published shortly after that.