3D Magnetic Field Observation Box
$44.50
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This self-contained device reveals the proper, three-dimensional nature of magnetic lines of force. The sealed acrylic box contains iron filings suspended in a silicone oil solution.
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Price History
$42
$39
(-$3)
$39
$44.50
(+$5.50)
$44.50
$39.95
(-$4.55)
$39.95
$36
(-$3.95)
$36
$39.95
(+$3.95)
$39.95
$44.50
(+$4.55)
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