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MAGNETIC IRON FILING SAND TIMER

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Time Marches On

STATUS: IN STOCK
95137P1 MAGNETIC IRON FILING SAND TIMER
$6.95 EACH
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Time Marches On
No, it doesn't; it runs out. See for yourself with this hourglass full of iron filings. The steel base has a magnet, so time flies when the glass is on it, and the filings make pretty stalagmites. Stick a magnet on the neck, however, and you can stop time altogether. Glass is 5-1/2" tall on the base and filings run out in about 40 seconds (three trips make a two-minute egg) with the magnet, somewhat longer without it.
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JARVIS RECOMMENDS

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Slick!
Actually a lesser slick, a racing tire with a Goodyear logo on it. Measures 3-3/4 dia x 1-11/16" in black (treadless) rubber with a 2” dia black plastic hub with a cap on one side so you can hide stuff in it. (Hey, what you hide is up to you.)
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$3.95 PKG (2)
Beauty Of A Stirling Engine
Use this little stainless beauty to teach teenagers and older students how heat engines work Then keep it on your desk, where you deserve to have it! This low-temperature-differential Stirling engine is beautifully machined. It works with hot water, ice water, a combination of hot water with ice cubes, or a hair dryer. It measures 5-3/4" tall with a 3-5/8" dia flywheel and a 3-1/2" dia x 7/8" tall base. The speed with hot water is approx 150 rpm. This is a real showpiece, the best we've ever seen at this price. Includes a 7-page instruction booklet.
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$89.95 EACH
Flexi-Sphere
Interesting wire contraption that we played with as a child. A series of (4) tiers of overlapping and intertwined brass wire semicircular hoops are anchored at the open end to a pair of full circles. The whole can be shaped into a tube, double balls, a flower petal, etc, depending upon what areas are opened, which closed. A variety of colored beads on the hoops add a decorative touch. Fun, intriguing and decorative all at the same time.
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$4.50 EACH
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