Gravity Hourglass Timers
Sale Price (non-members): $10.98
Sale Price (members): $9.88
Original Price: $20.00
Availability: Out of stock. This item is no longer available for purchase.
Marvel at the proof of Newton's favorite force, while observing sculpture in motion. Flip the liquid-filled glass cylinder and the hourglass gradually moves up as the colorful sand trickles down in the span of approximately two minutes.
7.75"h. x 2"dia.
Timing devices are in our measuring and mapping collections, National Museum of American History, Behring Center.
Every Smithsonian purchase will arrive with a museum provenance card explaining how it is adapted from or inspired by an object or objects in our collection.
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