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3 Minute Metal Liquid Hourglass

AM011

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Newton's Gravity Glass is a sand-filled hourglass suspended in a liquid-filled glass cylinder. The Gravity glass is an awesome desk-topper and a question-generating educational tool. When the cylinder is flipped, the sand within the hourglass moves down while the hourglass itself floats up. Standing 8" tall, this metal timer is sturdy and well crafted. 

Hourglass Sand Timer Accuracy

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