Sinkable ice made under a pressure of 30,000 pounds per square inch of water was revealed to the world by Percy W. Bridgeman, Hollis Professor of Mathematics and Natural Philosophy, today.
Most substances when solid or frozen sink in their own liquids, by ice floats, because liquid water is denser than it is when frozen. Harvard experiments have now shown that water follows the general law, but for some reason not yet known, does it at a different pressure.
This pressure has been ascertained to be 30,000 pounds by workers in laboratories, but no explanation for this has been discovered at the present. It is a freak of nature that ice floats, for if it sank, summer would be here before the Charles River was clear of ice.