How long would you wait to prove a point? A year? Eight years? 90? Well, depending on what you're trying to prove, you might have to be in it for the long haul. An experiment to show that the tar-like substance pitch was a liquid began in 1927, and it's still going on.
A Solid Plan
The Pitch Drop Experiment
Written by Reuben Westmaas February 7, 2018
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